https://arstechnica.com/gadgets/2016/12/high-dynamic-range-explained-theres-a-reason-to-finally-get-a-new-tv/
In addition to hdr rendering.. I almost wonder if we shouldn't mention HDR 'cameras' too (very briefly, but still).
Also mention about color spaces (e.g. Rec. 2020), framebuffers and how HDR, UHD and 4K namings intertwine. Also also dynamic metadata maybe?
trivia: sort of half-assed patches for older games should be possible