Using HDR1000 for just a few minutes I had to kick it down to HDR400, try watching some youtube on one side of the screen and have another window open on the other, like say Discord in dark mode... it noticeably dims discord when say the youtube vid shows a daylight scene somewhere, very distracting.
I don't use HDR for desktop use and I never would.
I have only used it for movies and TV shows so far which I have a lot of in HDR.