Its about time they caught up with the HP z1. But seriously, they should have gone for upgradable AMD Nvidia graphics and AMD CPU, and sold the top configuration for $1000 less than the proposed 8 core price. Will they ever learn.
Now, big mistakes. People here are talking games, and VR, rather than the real workstation performance aimed at. The game part is irrelevant to workstation performance but the workstation performance is more relevant to game, as a crap load of performance is required. Intel has also been caught out emphasising server rather than workstation performance. Now, apart from Napels, AMD is working on a supercomputer apu equivalent, and I presume there would be a non APU version. I suspect Inteks plans for a regular version of the Xeon phi might have something to to with it, though when Nvidia introduces a Linux based arm/volta super computer array sub block as a desktop system, it will all be irrelevant. Dragging ones feet in high tech is not necessarily a good idea.
I am in an industry dealing with very high end performance demands to process 8k images, with 16k+ holographics sensor images coming, which 72k plus eventually. At the moment dealing realtime processing in 4k at full resolutiin is rough on a Mac Pro (some software accelerates nicely though). For desktop publishing, graphic works, medium format photography, ads, cad, these sorts of resolution or processing power are usable already.
There has been questions over Vegas performance already. Apart from that, GPU's with their own directly addressable large memory and storage systems have shown great increases in performance in certain data intensive work flows. AMD has such a product, but based on an older GPU. But the ability to have multiple upgradable internal cards option is important (preferably 2-4+). So, maybe this might be viewed as an upgrade to the Mac Pro rather than a significant replacement.
30/32 or 40 inch version is needed, 27 inch is too small. In graphical workstation use these sizes are preferred for detail. But they also allow more space for processing options, cards, or slimmer sizes. So additional discrete gpu's can be included. Ultimately 55 inch, or higher for surface computing, but there is less need for that across different disciplines.
Lay down workslate mode.
Rec2020 8k-10k HDR screen. Rec2020, is a wider more naturally accurate colorsoace than old DCI P3 cinema standard, and currently the new consumer standard. It produces a lot of the colors used, and therefore gives you better accuracy for quality work. The consumer grade emphasis on the P3 standard neglects greater professional works. Basically, P3 is a professional standard for the delivery of consumer content, not an actual professional work standard. The situation is such, that there is a full spectrum color spaces called aces above them all (which support helps in doing professional work). Although all these are ultimately consumer motion picture delivery delivery formats, rec2020 and aces, actually cover good real world color spaces. There are a lot of advanced ways to do wide color gamut Apple could invest in (such as microled, and quantum dot on blue oled).
It needs an upgradeable internal optical drive for 4k bluray authoring/backup, or newer, and multiple patch bays, for cable sockets. Again, a larger screened unit leaves more space for these.
These are actual real workstation requirements.