One of the big hurdles with OLED is avoiding “burn in” and image retention. For TVs it’s not so much of an issue (although even with my 2017 LG OLED I’ve experienced temporary image retention) as the picture changes often, but with a computer display that often shows static images (think menu bars), it’ll be really obvious when you go to watch a movie or play a game.

Cost. OLED is still a few times more expensive then LED LCD.