Mago, exactly what I said before. Revamped nMP with Skylake.-W and tower like mMP with Purley and SKL-SP. Simple as that.
Maybe the 2 systems Ph. D mentioned will both come out of Apple with such setups.
I think Apple scrapped the lower system (and the tcMP) in favor to the iMac Pro, those pro's looking for 18 core and Vega 64 are likely to chose an iMac instead an trashcan and a 5K display Apple don't manufacture yet (but will do), Also I doubt the Macintosh Pro to Offer more than 1 socket, while its easier to find application for multi-gpu compute, unless you are doing software R&D on high parallelism is unlikely you'll die for more than 32 cores which is the max available on AMD Epyc.
To some Fanboys the idea to adopt AMD as mac's CPU seems unfeasible (as h/w launches at WWDC, or a final year keynote introducing Macs and iPads, or to introduce new MacBook before 12 months cycle tbMBP L16- M17) all these imaginary Apple Behavior its Bull5it Apple isn't an animal, its ore like an army firing on your wallet, they will do whatever to take your money and run.
AMD Ryzen/Epyc has some advantages for the next Macs: Cheaper, faster single thread IPC, more PCIe lines more peripherals w less components thus more efficient and reliable, ECC its optional across the line, not just a Xeon privilege, even the new Ryzen-APUs also allow for a Mac Mini (and non-pro iMacs) to have optimal graphic performance w/o having to switch to a discrete GPU.
New AMD cpus gained a positive welcome from performance enthusiast, biw arent the cheap slower power hungry intel alternative, are sometimes faster and cheaper but not cheap anymore, integrates RAM encryption which makes the system safer.
And there are rumours about fom many sources, not just anonymous, I mean KGI, other sources said Apple commissioned AMD a custom APU for the iMac, mini and Macbooks targeted to Q4'17, too much noise about AMD CPU in a Mac just to be a crazy assumption.
I post DNGs leak/predictions since are funny but sometimes he scores a hit, maybe the mMP will be his next Hit, I think we are few weeks away to meet the new mMP/MacMini.
Also, consider the next Mac Mini, maybe its not so-mini having decent CPU/GPU (ryzen 5/7 + Vega 11 + on board HBM2), this means the Mac Mini will steal lower end Mac Pro sales too.