What I'd like, and assumed I'd be buying after the good news on Fury X the past few days, are 2x of them in Crossfire, for $1300, with AIO hybrid cooling. For use on a Samsung 48JU7500 4k "television" that is on my desk and is my primary display.
Instead, if the Fury X does not have HDMI 2.0 support, then as you said it's GM200-only of cource, but to do that will cost $1500 instead of $1300, because the 980 Ti with AIO cooling goes for $749 each.
It was just a nice chance to flip to team red for a change, at a great price, for a great product. But due to a small error, something everyone at AMD clearly missed, it's not possible.
But yes, holding out hope that AMDMatt is an asshat who spoke without knowing what he was talking about, and the Fury X does have HDMI 2.0 after all.