There've been questions about who is the iMac Pro really for, and because it's non-upgradable, people who need a serious workstation will not buy it.
Exactly - the majority of iMac Pros are going into places with dedicated IT staff who are certified on how to repair them and have the spares on hand.
Businesses who need a serious workstation will probably order the precise spec they need on day 1, get a same-day-callout service agreement and replace the machines every 3 years for tax efficiency - or get it all on a lease. The people for whom user-upgradeability is a dealbreaker are more likely one-man-bands, hobbyists and enthusiasts who don't get invited to Apple's super-secret focus groups.
Hopefully next year we will see the much-anticipated modular Mac Pro, for the professional and power users that DO want or need access to the internal hardware, expansion slots, drive bays, etc.
For whatever reason(s), in the past few months Apple has changed their minds (or had them changed for them) on offering a "sealed box" workstation and so now we will be getting a modular Mac Pro.
People really are donning the rose-tinted specs over this "modular" and "upgradeable" thing. Read the
transcript of that press conference and try and deduce what the Apple folk mean by those words, not what
you'd like them to mean. Schiller uses "modular" to distinguish
current offerings from laptops and all-in-ones, while Federighi uses "upgrade" to refer to
Apple's ability to keep their product up-to-date. The fault they acknowledged with the trashcan is that it is dependent on a three-way distribution of heat between the CPU and two GPUs so even
Apple can't offer a version with a single powerful GPU or a better choice of CPUs. There's certainly no mention of
user swappable GPUs or PCIe slots. Now, obviously, I'm just speculating like everything else, but I don't see anything in that interview that would make Federighi or Schiller's pants catch fire (at least by executive-speak standards) if the new Mac Pro was no more user-upgradeable than the trashcan.
My guess is the iMac Pro will justify prices for the Mac Pro that will start at $8000.
Quite possibly. It will probably be priced to avoid cannibalising iMP sales, so we can rule out better-than-iMP specs for ~$5000, or iMP-like specs for < $4000 (you might buy a MP + third-party pro display instead of an iMP). I think the CPU/GPU specs would have to be better than the iMP to justify your $8000 tag, but I wouldn't fall off my chair...
For a few hundred more, you're getting a substantially improved processor, GPU and cooling system with potential for more RAM, not to mention a bit of exclusivity with the space gray/black finish.
The current top-spec iMac 27 (not iMac Pro) is $5,300. Anyone doubting this can check it themselves on the Apple web site.
OK, first that $5300 figure is bogus, because it includes 2TB SSD (base iMP is 1TB) and 64GB RAM (base iMP is 32GB) - and those two upgrades are hideously expensive. Price for a 1TB/32GB, but otherwise fully tricked out, iMac is $3700 - and you can shave a few hundred bucks off that by getting 8GB RAM plus a third-party upgrade.
Second, all we know for certain about the iMP processor is that it has 8 cores (all else is speculation) and all that guarantees is that it will spank the iMac's i7 at synthetic multicore benchmarks.
It is perfectly possible that the i7 will give the Xeon a run for its money at single-core and some "real world" benchmarks (this has always been true of the iMac vs. NMP). A lot of the Xeon advantage is stability (from ECC RAM) and i/o bandwidth. So while I'm not suggesting that the CPU isn't "better", whether it is "substantially improved" will depend heavily on whether your workload takes advantage of the Xeon and the GPU.