Except HDMI 2.1, which is already on the market, already solves all 4k resolution/refresh limitations.
Heck, even though DP 2.0 does have more bandwidth, both HDMI 2.1 and DP 2.0 cover more or less the same resolution/refresh combinations, with the notable exception that HDMI 2.0 needs DSC for 8k60 and DP 2.0 doesn't. HDMI 2.1 also has the advantage of built-in VRR support, which is still optional as of DP 2.0.
Unless your holding out for an 8k monitor, there's literally zero reason to wait for DP 2.0 over HDMI 2.1.
A better question is, where are Display Port 1.4 monitors? I've been waiting for a 32" 5k monitor, or an 8k monitor that does not need two DP 1.2 cables, or for a 32" 4K 144Hz monitor for nigh on 5 years now. I don't give a toss about DisplayPort 2.0. DisplayPort 1.4 is perfectly fine, but there are scarcely any monitors that put it to use. We live in a world where some people salivate at the thought of 2560x1440 and think it's the next great thing when it comes to resolution. I'd buy an 8k monitor in a flash, even for $5k, if it did not require 2 DP 1.2 cables.
This is a post about linguistic capabilities. Or the lack of it. Can you really write something like : "In terms of whether graphics cards will arrive"? There's 3 words too many! Or does it matter how you explain yourself? How about writing articles for 30 days without saying the ubiquitous "in terms of" or "when it comes to"? I learned in school that if words don't enhance comprehension you should not use them. Lots of authors said so. My favourite is George Orwell.