I use HDR all the time in Windows. Most newer AAA games support it, all my 4k movies, and being able to make true HDR photos and video is nice.
You won't notice a difference most of the time in normal desktop use because most desktop apps and the web are all SRGB, and get tone mapped accordingly when HDR is enabled. To really notice a difference with HDR content though, you need a good HDR monitor and not just one with basic DisplayHDR 400 certification, and either an OLED panel or mini LED full array local dimming.
Windows' HDR implementation is far from perfect (the gamma tracking on SRGB content is incorrect, for example), but it's a far cry from Linux where HDR support just doesn't even exist. I can't even realistically use Linux as an OS for a home theater PC anymore.
macOS is probably the gold standard when it comes to polished HDR support, especially with mixed mode use (HDR and SDR content on screen at the same time)
You won't notice a difference most of the time in normal desktop use because most desktop apps and the web are all SRGB, and get tone mapped accordingly when HDR is enabled. To really notice a difference with HDR content though, you need a good HDR monitor and not just one with basic DisplayHDR 400 certification, and either an OLED panel or mini LED full array local dimming.
Windows' HDR implementation is far from perfect (the gamma tracking on SRGB content is incorrect, for example), but it's a far cry from Linux where HDR support just doesn't even exist. I can't even realistically use Linux as an OS for a home theater PC anymore.
macOS is probably the gold standard when it comes to polished HDR support, especially with mixed mode use (HDR and SDR content on screen at the same time)