The X90H was touted as THE TV to get for next gen gaming from Sony themselves, yet can't even do two next gen HMDI 2.1 features simultaneously. 4K works, broken at 120Hz. VRR doesn't work correctly if other 2.1 features are in use. Can't do Dolby Vision and 120Hz. It's basically a 4K60 TV with Dolby Vision and no VRR. So for that reason, I'm never buying another Sony TV again because they can't get their act together. LG clearly has the gaming TV industry cornered.Na LG have struggled with brightness on their OLED's since they invented them, they cannot uniformly get bright enough, the marketing is based on a small amount of the screen for a short duration, so basically useless information.
This video might be a little boring but it shows and explains why a higher brightness affects the image quality so substantially:
What was wrong with the Sony TV? I also plan on getting an LG next but my current set is a few year old Sony and apart from some appalling firmware updates it's been pretty good.