HDR is still very new on premium 4K tvs with 2 competing standards, Dolby Vision and HDR 10.
Whether it can easily be added to games remains to be seen, final screen buffers will take up more memory to start with and thus more processing time. And if not all effects are rendered and calibrated in HDR it will show. A week work sounds like quite a bit of effort during crunch time for a small percentage of a small percentage of 4K tv owners. Likely for movies only again.
The article is right anyway, HDR is a much bigger advantage of 4K tvs than the resolution increases, unless you sit 6ft from a 65" tv.
Actually I already have an HDR display, my old 34" HD ready CRT tv. I'm always amazed at how bright the colors are and how deep the blacks are when I turn it on again. It's about time LCD displays catch up to that.







