We hook our Steam Deck up to a 4k projector and it looks amazing. The built in upscaler from 800p to 4k is astonishingly good. Obviously not AS good as native but and many games are limited to 30fps but holy smokes it’s more than good enough.

Yep quite right, I was just clarifying because you said “low res. 720p or maybe 480p” - the Steam Deck is 800p native. Total agreement.

Steam Deck screen is only 800p so that’s the resolution for all games. And it’s perfect for the screen size.