I remember hearing that the peak brightness of OLEDs could be pushed to around 1000 nits, and yet here we are in 2020 and we're still seeing full field brightness capped at a miserable 160nits and even a microscopic 1% window only hitting 640nits.
As much as I love my OLED it's an ancient B7 and it's disappointing to see how little progress has been made since. There's no reason for me to upgrade, and I guess I might have to wait for non-Samsung MicroLED (no DV will always be a deal breaker), if that ever exits, to get something which is truly an upgrade.
Earlier this year I bought a 1000nit 512 zone FALD PC gaming monitor and it certainly makes for an interesting comparison with my OLED. The brightness is far, far higher, and if it has an ABL it's pretty subtle, so full screen white is like staring into a floodlight. But FALD, even with 512 zones is an ugly mess of bloom and afterglow, pixel response time (even on a high end gaming display) is awful, and unless you're right in the sweet spot the screen washes out immediately. All in all the OLED easily beats it, but HDR sure does pop with 1000nits.