[SomeoneOnTheWeb]

IF you have a display that can it roughly a 1000 nits, then for movies and games yes definitely the difference with SDR is pretty huge.

If you have say a 400 nits display the HDR may actually look worse than SDR. So it really depends on your screen.

[simoncion]

Honestly, I find the extended brightness FAR less important than the extended color gamut. I have a ~300 nit VA monitor that I'm generally quite happy with and that looks fantastic with well-built HDR renderers.

Given that monitors report information about their HDR minimum and maximum panel brightness capabilities to the machine they are connected to, any competently-built HDR renderer (whether that be for games or movies or whatever) will be able to take that information and adjust the picture appropriately.