Exactly it "depends" I frankly don't expect too much of the next generation of MBP as it will likely just be a sleeker, slimmer version of what we already have with the addition of TB3. I think it`s petty much given that what we will see physically will be a larger MacBook. I guess my issue is that I expect Apple to produce "professional" level notebooks for lack of better words, when in reality Apple`s focus is average consumer, which makes perfect sense for the volume sales that Apple seek.
Serious question:
What do you consider to be a requirement of a "professional" notebook? What do you think Apple is missing?
I'd argue that portability and battery life are in fact the two most important factors for the majority of "professional" users in a
portable.
If you're just lugging a machine from desk to desk for high end work you can just as easily do that with a Mac Pro (Assuming you can borrow a monitor at the client's premises or whatever).
Then comes ports. And in this regard there is simply nothing in the market that has the external connectivity options of the Macbook Pro. Or even a future replacement with TB3/USB-C. 10/20 gig finer channel/iSCSI SANS, 10 gig networking, thunderbolt direct attached storage, external GPUs, etc. It's all available. Thunderbolt is the only option that can do a lot of that, and lesser options such as USB3 can be carried over thunderbolt if required anyhow.
As far as "Pro" stuff goes for me, I reckon the Macbook Pro line is pretty on the money. ECC RAM and a better GPU for some users sure, but once you start trying to stuff high power GPUs into a portable you just kill the battery life so badly it is desk bound when actually using the GPU in anger which means you're back to the point of "may as well lug a Mac Pro from desk to desk".
In terms of GPU
power per watt (which is what matters when on battery), nothing on the market can compete with the intel integrated GPUs at the moment. Hopefully third parties pull their finger out this time around with Thunderbolt 3 eGPUs. You can already buy off the shelf thunderbolt GPU enclosures, a mate built his own (hooked up to an 11" MBA) and stuck a titan in it... can't really do that with any other portable. And that will SMOKE whatever internal GPU you can get in anything else, and not weigh 6kg to carry when you're on battery (at which point the discrete GPU is useless due to minuscule battery life when working it hard).
So really... what is the MBP missing in your opinion in terms of Pro features, vs. what else is out there?
edit:
what i'd really like to see is a 15" machine with 2 CPU sockets in it. Get rid of the discrete GPU, and use the thermal headroom you get back to do dual socket quad core CPUs, and hook up an eGPU when on AC power at a desk.
16 threads in a portable (with 2x intel GPUs for when away from the eGPU), yes please.
I realize intel do not currently offer multi-socket capable mobile processors, but I'm sure Apple can swing it. Or just demand an 8 core mobile CPU with a bigger integrated GPU in it...
Internal storage and expandability for me are a non-issue. If you're storing massive amounts beyond 1 TB on your portable you are doing things wrong. It's a scratch area for projects you're working on whilst your actual permanent storage is a SAN somewhere...
And pro/business users don't generally upgrade (well, sensible ones with a concept of TCO don't anyhow). You buy the spec you need, sell it and replace once it is considered EOL by the business. The second you're paying someone's time to crack the things open and spend money on replacing parts, you're burning huge amounts of money in lost time, lost warranties, etc. For a Pro booking out a few grand a day, a couple of hours lost time while the machine is in bits (let alone also paying someone to actually do the work and pay for parts) would pay for trade-up to a new machine.