After 501 pages of conjecture, it seems that some people never read or completely forgot what Phil said during the infamous Mea Culpa.
I'll cherry pick a few points to get people back on track:
"As part of doing a new Mac Pro — it is, by definition, a modular system — we will be doing a pro display as well."
(Mac Pros have always been modular since forever— so the Lego theory is just pie in the sky. What isn't modular? iMac & laptops)
"
So we see a really interesting complementary role for our silicon working with Intel. And we certainly work with Intel on our needs to deliver chips into our Mac roadmap and we see that continuing."
(So sorry all you AMD & ARM daydreamers, the next MacPro CPU is gunna be Intel's and by default that means Xeons).
I'll leave that there. There are more hints as to what it may be like (capable of accepting a single powerful GPU and capable of being upgraded BY APPLE in the future- if anyone cares to read the transcript carefully.
https://techcrunch.com/2017/04/06/t...-john-ternus-on-the-state-of-apples-pro-macs/