Posted this in a thread on XDA as well, but figured I'd share here.
My friend got an AT&T SGS3 and we were comparing the screens to see if any of the issues with the Nexus screen were still present. All I have to say is the SGS3 screen is night and day better than the Nexus:
- practically ZERO banding, even at lowest possible brightness
- color remains much more true even at lowest brightness
- no tinting I could detect at all, even at lowest brightness
- played back some videos and it's flawless. No artifacts, no color banding/gradients, no splotches.
The screen is practically indistinguishable from an LCD, except it maintains the deeper blacks.
Looks like Samsung really did tweak the hd samoled process technology for the SGS3 screen. I think I'm going to pick one up, once the dev community situation shakes down and I know if I'll have good dev/ROM support.
Kind of sad looking at the Nexus display now.