This thread is really off the rails at this point. Billrey, you haven't helped your point, which has merit, by taking a combative tone from the outset. It has been true for ages and ages, that if you want to build the absolute highest-spec machine possible, especially for 3D work, you are probably better off with a PC. The fact that you can use AMD or Intel processors, whichever is best at the moment, and the fact that you can use either AMD or NVIDIA GPUs, whichever is best at the moment, pretty much always has made it that a top-specced PC will beat a Mac, and sometimes do it at a price savings. None of this is new at all, and the new shiny Mac Pro doesn't change it. I mean JFC, 3ds Max isn't even available on OS X. Can we move on?
However, what also hasn't changed, is that for many pro media users, many of whom are still on Macs and will not leave Macs no matter what (and probably have plenty of good reasons for taking this stance), there is finally a new game in town, if you want a powerhouse machine. Yes, many of these people will be doing high-end photo and video work, motion gfx, audio, color, compositing, etc. etc. But the fact is, if someone's particular Mac-based workflow can benefit tremendously from having many cores, from having multiple GPUs, way more maximum (and faster) RAM, from having more interface/networking options, more internal storage, etc. etc., these new boxes are the HOTTTTT ****! That is also a fact.
I swear to god, you're on a forum for around 2 decades, and the same platform troll battles go on, and on, and on. They don't change. It's all so banal, but I guess that describes the state of the world in so many ways these days.