Black levels make a lot of difference for details in dark scenes in movies and games. Games aren't all bright images - many RPGs have dark underground areas for one example. I have 3 OLEDs, including a CX48 as my main monitor, because they are the best screens for the job at those locations.
Yup. The HDR1000 'spec' refers to 1000 nits peak brightness, and well, that's bright enough to force a flinch for anyone not expecting!
Most don't seem to realize that ~200 nits is actually pretty bright for desktop work, and that desktop operating systems have some pretty glaring limitations when it comes to employing HDR. I'll take an OLED 'monitor' that hits HDR400, so long as it can maintain color accuracy and motion resolution without burn-in!
I can't say I'd notice a difference between 120Hz and 144Hz.
Perceptually, they're essentially equal, and it'd only be arguably different if both panels were OLED; as it stands, the 'slower' OLED probably has far higher motion resolution. You'd need a much larger jump to make a real difference, and believe me when I say that I'm on board for 240Hz+ OLEDs, I really could give a rats about 'faster' LCD panels. Nice to have, sure, but after 120Hz that's literally the last spec I'm looking for.
I already have two 165Hz panels that aren't even
close to being capable of keeping up with the refresh rates they support. Newer panels are better, yes, but they still suffer from the same basic LCD limitations.
I went with a Samsung "QLED" for a brighter room because it was a better screen fit that location.
I'd still buy an LCD
TV for a bright room too. Granted, I wouldn't choose to have a room so bright in the first place, but that's neither here nor there really; I get that 'we' don't always get to determine what's optimal or what a particular space is dedicated to.
For $1500+, I'll take the CX48 every time. If it was $1200, I might go for the 43" LCD.
If I'm spending a grand, I'll spend a grand and a half to get the right tool for the job, rather than having stopped short and wishing I did. If I have to use it, at least!