I also bought a 4K OLED TV last black Friday. It's great. I played some games on it and it was amazing.

One thing that was off-putting: I'd noticed that the picture isn't perfectly square. Indeed, it seems that the TV warps the picture over time until you go through the one-hour-cleanup-thing in the settings. It's basically like oldschool degaussing, I gather.

But the color reproduction and contrast is amazing. My old 23" LCD TF panels just don't hold a candle.

I'm considering getting one of those LG 65" OLED TVs, after seeing one in-store and being completely blown away by the picture quality. Much like the GP I can't recall the last time I saw a display that actually wowed me, but watching a space shuttle take off, and bright stars as dots against a pitch black sky without the typical blue-ish backlight bleed, was just amazing. I stood there watching the same 4-5 minute video loop for what must have been half an hour or so.

But your comment now gives me pause – the picture warps over time? Do you have any sources on this so I can learn more?

Certainly it's nothing like degaussing; it's a panel of individually addressable OLEDs that do not move, not a vacuum tube.

My guess is that this is an artifact of some sort of 'motion control' or other processing the TV applies.