OLED and burn in...
Is this an issue like Amoled phones can have?
I've been using this TV exclusively for PC for the past 100 hours so far and it does suffer from minor burn in, that is only visible during completely black screens. If you do not have the brightness properly adjusted, it will have white streaks in the center, that are very feint; but if you turn the TV off for about 6 hours it goes away until you use it again for over 5 hours.
A properly calibrated TV, you will not notice the burn in at all.