If they use Standard, I don't really care if it ships with an AMD VEGA, enen though I
I got into a Back and Forth with someone on this forum just today about this same fact the iMac Pro seems to be an ODD DUCK IMHO. If you have an enclosed system, like an iMac, NO PCI-E, NO NVIDIA, NO CUDA, no way to use in a a machine room with FIBRE or something similar, then Apple has to be designing it for their Closed software environment.. Which for Media is Final Cut Pro X(BLAH!) and Logic Pro X(BLAH! BLAH!).. Both of these Apps don't work in a Pro Environment. I share a building with a Pro Audio studio.. All Cubase and ProTools and our studio AVID, PPro, Blackmagic Resolve and Autodesk Flame.. No one in our whole building touches any of the Apple Pro offerings anymore.. I mean they might be a great place to cut your teeth to learn the basics, but they can't do commercial, broadcast or tv/film level work. Not saying someone couldn't do it as a one off thing, but in a pro environment, day in and day out, with multiple clients and multiple suites and bays, it doesn't work.
So I feel like the iMac Pro is better suited for Software, VR and Game developers... And maybe some small one person media shops..
No one in your whole building? Well that is some serious sample size there. Focus, Saved by Grace, and other features use FCPX. They must be in another building.
Here is a list of professional Logic Pro users (http://equipboard.com/items/apple-logic-pro-x). Probably just down the block from you.
Other people are still just people. We've all had a bad experience with some software/hardware/company and refuse to do business with them. Some of us have different workflows.