“HDR through computers is currently a very sad affair.” Oh no, it is actually a happy affair. A complicated affair maybe, but for me it has worked first time & straight away. You hook your Win10 PC to an HDR UHD display and turn on HDR in control panel Display Settings. (At NVIDIA control panel level, I am feeding 2160p30 12bit 4:2:2 to the display, an LG OLED.) And then I play PMP (TV interface full screen) on that and direct play 4K HDR MKVs in PMP no prob, great/proper color, it’s beautiful. (Yes, I have confirmed direct play and BT2020 at the display’s level.) Good job Plex, or Microsoft, or somebody. But bad job, Plex, on HDR->SDR at the server level however. Let’s fix that one day.