If you wanted to, you could think of Snow Leopard as Leopard for Intel done right, and that it's Intel users who have been 'ripped off' by Apple all this time.
The whole point of Snow Leopard is optimization. Why would Apple spend resources optimizing for an EOL chip? Snow Leopard won't have any new features (except Exchange support), so why would PPC owners want to buy an OS that centers solely on optimizations around an architecture they don't have?
I don't get it. As far as i can tell, unless you on rely industrial strength apps that thrive on things like threading, parallelization and memory space, PPC is alive for most users until the cat after Snow Leopard.
Did you ever think for ONE MOMENT that there's MORE to optimizing an OS than the particular CPU involved? Unless Apple is making Snow Leopard in assembly language, I would imagine MOST of their optimizations have to do with general code optimization which pretty much works across all CPU platforms. And in case you hadn't noticed, OSX is made for more than just Intel CPUs today (i.e. guess what, the MAIN reason they want to optimize it is so they can squeeze more efficiency, power and use less resources on the iPhone and iPod Touch, which in case you didn't know, are running OSX Leopard). Oops! There goes most of your argument.
Personally, I wouldn't be so quick to assume that the final version of Snow Leopard will drop PowerPC support. Indications are that the hooks are still in the system. Just because a beta build doesn't include support, that doesn't mean it won't work in the end. It may not be 'as optimized' as the other CPUs, but that doesn't mean it won't be present when it ships.
I'm guessing they want a new 10.6 designation because it will play some integral part in their gizmo and they want to stress how improved it will be. Personally, I'd like to see an integrated Apple car computer system--part iPod, part navigation system, part iPhone and part car computer interface. You could EASILY load the thing up with data, updates and music in your own garage across your own WiFi network even. You wouldn't have to use any discs, memory sticks, iPods or laptops to transfer data to it. Given that technology is coming to the forefront in the automotive industry, I wouldn't be the least bit surprised if that's where Apple shows up next, shipping WITH certain new car lines. I believe there was already some mention in the past about Apple working with that industry. A meaner, leaner OSX means a faster, better operating system in that environment with less costs per unit involved. There's also the question of what CPU such a system would use (the iPhone uses a 620MHz ARM CPU, for example, not an Intel CPU. For all we know such a system could use the next generation PPC chip.
Look at which semi-conductor company Apple just bought and what they previously made. Here's a hint, it was PowerPC!!!). People are PUZZLED why they would buy a company that specializes in PowerPC chips when they apparently got out of that business...or did they? What chip would be easier to develop for in the future that does NOT use a chip that could be made to run Windows? PowerPC would be protection against a car maker switching mobile operating systems if they heavily invested in their current lineup with an incompatible CPU whereas Apple's OS can run on ANY of them. Think about that for a moment. Is PowerPC support dead? I don't personally believe so. I think they're planning on using it in their next generation product and I think that product is autoMOBILE technology. Imagine a Lexus running OSX and the things it could do for you while you're on a trip, for example.
There's also the possibility that iPhone 3.0 will switch from ARM to PowerPC. And if OSX is truly maintained internally to be optmized for BOTH Intel and PowerPC platforms, if the CPU curve ever went the other way again, Apple could easily reintroduce a desktop using it again with ill-effect because the OS already fully supports it. Linux can run on a LOT of CPUs. Maybe Apple is thinking to the future NOW so it'll be ready to ship THEN.
In any case, if people want to ENSURE Snow Leopard continues to support PowerPC (even if less optmized than Intel in the end), they should raise as big a stink as possible with Apple NOW when it's not too late to add/retain it.