HDR seems to work decently in certain games - D2R is a good example as I mentioned, and SW Jedi: Fallen Order as well. Desktop use just sucks.. badly.
I'm hoping to get an hour or two of gaming in before I leave for another mission, but I'm not blown away by the monitor; I kind of expected that coming from something as amazing as the OLED. Couple bullet points..
A) I don't have to worry about burn-in anymore. Even though I think the issue is over-blown, you should try your best to avoid doing X/Y/Z that could make it worse. I found myself doing that pretty often, and worrying about it.
B) Size .. 48" seemed fun until I realized how awful it was playing an FPS.
C) OLED ABL - Kind of unavoidable unless you want to buy the LG Service Remote, disable ABL all together, and then murder the lifespan of the individual pixels.
D) LG Screen Dimming (inactivity) - this was actually a huge issue for me with D2R. LG has the screens set (to combat burn-in) to dim if the screen does not detect a scene change. Well.. playing D2R, a lot of the scenes are dark. The CX48 would end up dimming to 10% brightness or something like that, as if I wasn't actively using the screen, and I'd have to either open the main menu or alt-tab real quick to make the screen sense a scene change. That was probably my biggest gripe.
E) While HDR also looked terrible on the OLED (for PC use - movies it's still amazing), I will say the OLED has zero bloom, and the bloom is so poor on these screens utilizing local dimming, that I think HDR is better on the OLED.
Overall the monitor does what I bought it for. I also bought a monitor arm as the stand was kind of shaky. I think CurrentlyPissed mentioned the same issue - if I swiped my mouse hard to spin around or something, the monitor would shake .. lol.
Bought a monitor arm, and it works pretty nice. Still trying to get it lined up how I want, but it's nice.