There is zero logical reason Apple should ever allow clones again.
It would be viable if Apple gets out of the computer side alltogether (no more MP's, XServes, Mini's, iMacs or laptops).
However, that's not likely to happen soon. It is possible however that some portions of the computer segment could disappear as the market has shrunk to the point it's no longer profitable.
How many other companies have an 8 core computer as part of their primary lineup? Even Dell's dual-xeon option starts at a pathetic 2.0ghz and comparable configurations are more expensive than a MacPro.
The T5500 is a DP system. Yes, the base CPU's may not be those in the base MP Octads (pre 56xx parts based systems), but it was and is possible to opt for different parts (i.e. faster if needed).
As per pricing, it's competitive. If you actually pick up the phone and call, it comes in under the MP with the same processors (other parts are only as close as possible, which is basically a base system otherwise; absolute parity is impossible). Upgrades would have to be priced out via 3rd party sources to keep things equivalent (such as the fact they can use the same RAM - no special heatsinks this time). Graphics are more difficult, as there's additional options on the PC side, and equivalent cards of those used in the MP's are cheaper (i.e 4870 and GTX285). The same will be the case if the 5870 does release as a Mac edition as well.
And don't forget to add in Apple Care to the MP, as the PC's come with 3yrs standard (it may only be $249, but it matters).
So PC's do have an advantage in terms of some 3rd party options (choice and pricing beyond the system's sticker price).
So to me, the biggest differentiation is the OS (both systems aren't DIY, so you've a warranty).
Yes. Its buggy, slow, unreliable and just a wanna-be version of OSX and no matter how you look at it its just a tweaked version of Vista.
WTH?
It's not buggy, or slow (some applications, such as IE8, I'd agree, but it's easily fixed -- get a different browser = EASY

). Tweaked Vista, it's not far off, but in operation, it works much better (even after SP1 and SP2, which improved it a bit more). There's been members besides myself that use both and have had more issues with OS X lately than Win7 (RAID, audio, eSATA cards to name a few). And for workstation class systems, this is extremely important. It's perhaps odd when you think of the not to distant history between Apple and MS's OS products, but I've no reason to doubt the posts available on MR.
Apple's lost the edge in OS X that they once had. Not to say that MS won't blow it with the next release (they've a history of it afterall), but Apple has to pick it up as well and deliver a more stable product. I still like the idea that it's UNIX, as Windows has a smattering of UNIX + a lot of proprietary code.
Thats why I have a $100 "emergency" PowerMac G4 sitting in my closet. It hasn't been used in 2 years and my G5's uptime is up to 45 days (far longer if you don't count software install/update reboots).[/QUOTE]
nano: I already had the Mac Pro – not as a backup machine, but you're right, I could use it for that if I need to. I have a couple of other machines lying around too that I could use for that purpose, though.
Well to me, in a case of 2x systems and one goes down, the other becomes the "backup", as the other will be used to help search for solutions (web), or test hardware in the event something is suspect (board, PSU,...). Whether it's the primary system or not.
So, as I said, "if" Apple is not interested in the workstation market, license it out selectively to a partner who is interested in that market. What's in it for Apple if they do this? Hardware license fees and OS license fees. What's in it for Apple if they ignore this market? People building hackintoshes and, who knows, maybe or maybe not loading them with purchased copies of the OS.
It's possible, but I doubt it, as Apple likes to have full control over everything. Licensing would provide some, and a validation program even more, but there's still limits as to the extent it could happen.
Most likely, OS X licensing wouldn't happen unless Apple totally abandons the computer market and goes with the devices alone. Possible, though not probable at this time IMO. There's still money in it.
Fine, but I've got my own business to run, and it currently depends on a key supplier (Apple) that chooses not to inform me of its plans regarding the professional equipment and software I depend on. Professionals like me are a very different market from the customers for the iProducts that now dominate the Apple line. But we're clearly a shrinking share, and it remains to be seen where we will be in Apple's plans. So I'm not bashing Apple, just seeking a business partner I can rely on. Waiting, but my supply of patience is not unlimited.
This is a very valid point IMO, and the biggest reason for all the posts and multiple threads that exist on the next MP revision. Every other major player in the enterprise market releases information that IT planners use to gauge what products they're interested in for their company (whether it be a single pro or a Fortune 100 sized entity).
Apple is not de-prioritising anything. They update their products when components are available in the right quantity and the right price to make an improvement over the product they have.
They have limited resourses (i.e. human), so they in fact do have to prioritize what they do, and you can bet it's based on what products have the highest ROI in terms of development costs/profit margins of expected sales.
Most products have had a fairly regular update cycle, but some such as the

TV are an afterthought compared to others (Apple even refers to this particular product as a "hobby").
If you were a real pro, ie. a user of a tool rather than a tool of a user you'd just buy what's available at the time you need it. Rather than prattling on about how your vendor doesn't love you anymore or give you advance notice of a product that would kill current sales.
Comments such as this indicate you're no pro either. Pros have to
plan their purchases (i.e. MTBR =
Mean
Time
Between
Replacement, which is a planned lifecycle of a product). It's typically 3 - 5 yrs, depending on what it's used for. And when a planned purchase doesn't materialize (nor are any announcements surface), it makes them panic, and eventually scramble around for an alternative solution.
And it's at this point it gets really messy, as the investment in OS X also means OS X based applications. Simply put, most pro software is really expensive (as in 1x suite is more than the cost of the system used to run it). Fortunately, this isn't as much of an issue for graphics pros as it is for others (scientific/engineering applications for example, which can easily exceed $10k for a single license).
So switching back to either Windows or Linux usually isn't possible due to the software cost. The budget requirement is too high, and that's even before considering the cost of training on new applications if necessary.
Now if you found yourself in that position, wouldn't you be rather pissed off?
Again, this is not my favorite scenario. It's only IF Apple decides to depart the workstation market, what might be possible as an alternative to us all having to move over to Windows – or building hacks, which I have neither the time, expertise or interest in doing.
It's a solution, but one I wouldn't expect to happen if Apple's still selling other computers (iMac, Mini, or laptops, including the Air).