Just a real IPS or VA, with actual good colors would already be so much better. And probably be a drop-in replacement for whoever just want's to upgarde the Deck they have, doesn't even need to be higher resolution.
OLED would probably drive the price much too high and not be a drop-in replacement which makes it a hard pill to swallow, even though it looks so nice and I've been replacing all my screens with OLEDs these last years.