The steam deck can't even connect to a 4K tv without having problems in Game OS. It's no threat to the switch.
The game OS is crap, and it being Linux will turn off a LOT of other people with trying to get games to run.
I'm actually about to...
While that's true.. it's also not true. With "Realistic" graphics, you have to have "realistic" movements and animations or it looks completely out of whack.. Like double jumping.. But with stylized graphics, it doesn't jump out as clashing.