Based on quick testing I think this is overall a good update with lots of options.
I would say that currently "bright" HDR modes for people who prefer bright overall image are:
- Console HDR + Dynamic Brightness Boost: This is same as the previous beta firmware and also definitely the brightest mode. Tradeoff is clipping for high brightness values on high APL scenes when the panel cannot keep up with the desired nit level, which can bother some if you are sensitive to that. Although in my experience rarely visible in real games and easy to ignore. You can mitigate this by calibrating HDR with lesser peak brightness such as 800 nits instead of 1000 so the game doesn't output values outside of panel capability so often.
- DisplayHDR 400 True Black: This is no doubt the most "accurate" bright mode as it functions more in line of the panel capabilities (panel can only do 280 nits full screen). But unfortunately it also means you don't reach 1000 nit highlights that the panel is also capable of.
- Dolby Vision Bright: This new mode seems to be pretty good overall too. Not quite as bright as the above two modes overall, but in comparison seems to have less noticeable ABL behavior and slight gradual falloff for peak brightness values so it doesn't have so hard clipping as the dynamic boost mode. Negative for this mode is that not all games support it. Using borderless fullscreen in most games I tested allowed the game run with DV mode active even if game itself doesn't support DV, but some switched to HDR10 mode instead (unless in windowed mode which isn't a real option).
At least now there is good selection of options and the old Console HDR mode is also available for those who game in dark room.
EDIT: As noted below, Cinema HDR + Dynamic Brightness Boos (auto on) seems to be the new "best". It is same brightness as Console HDR but less clipping.
