Mastering workflow for linear images for HDR displays

I’d like to have both actually. A calibrated sRGB or AdobeRGB display AND the best attempt of the manufacturer of a HDR rec2020-pq/hlg rendition for the wow factor. Of course a calibrated HDR display would be better, no doubt about that, but until then give me the other one.
The video HDR demos at the electronics retailers look mind-blowingly better than sRGB displays. The prices are dropping and photographers can’t even display a static image? Aren’t even Games starting to exist in rec2020-pq?

Shotcut can talk to blackmagic SDI/HDMI cards…since it is based on MLT framework it probably only writes 8bit data into some memory which gets displayed. If colormanagment in wayland is so broken or so much of a chicken-edd situation, how about talking to a decklink for displaying static images?

a) what is the difference in that Windows case between consumption(displaying?) and creation? As I alluded to above, displaying is not the same as color-critical editing/decision-making.
b) do you mean the vesa-HDR vs. HDR10 vs. DolbyVision vs. HDR10+ multitude of ‘fromats’?