The biggest problem with HDR is the utter lack of consumer education about what it is. It does not add more “pop” or make the image brighter. It allows devs to get more precise definition and accuracy in darker images.
But consumer misunderstanding encourages devs to do the opposite. HZD looks amazing, but HDR is kind of a joke. It’s not it more realistic looking, instead making the image pop more.
The lack of consumer understanding, which also affects most game journalists, allows TV manufacturers to get away with shipping crappy HDR modes, because consumers can’t even agree on what it should look like.
One reason to ship a crappy HDR mode is to achieve better input lag ratings. Rtings.com rates TVs for HDR gaming primarily based on input lag. To find out if it is actually good, you need to look at color gamut and dimming zones. I don’t think 100 is required, but the more the better.
I think most gamers would be better off shutting HDR off. That’s what they actually want their games to look like.
HDR for movies and TV is designed primarily for dark rooms. Again, it allows them to keep the brightness down, which is blistering in a dark room, while still being able to show more detailed images.
At this point, HDR is still too complicated for mass appeal, but TV manufacturers, and the like, know that it’s a great bullet point to help sell products.