The QD-OLEDs from Samsung which use a similar trick as their "Quantum-Dot" LCDs do, also hit similar levels: https://www.rtings.com/tv/reviews/samsung/s95c-oled#page-tes...
Real scene SDR brightness is all that matters for use in a bright room, as it represents the overall brightness of the screen when playing normal content. HDR brightness on the other hand is only observed in certain scenes of particular HDR content mastered to use it - not to mention that such HDR content is more likely to be consumed in a dark room to enjoy the darker details not present in SDR.
I think the limiting factor right now on those new OLED sets is thermal throttling and power limits. But all is not bad - it shows great promise of near a future where self-emissive panels have food brightness.
Still, that's 500 for the those OLED sets vs 1200 for the QN90B.