As long as you render the games at the Steam Deck native resolution (i.e. 1280x800) and use the FSR upscaling option this works perfectly. I do this to output to my 4K TV and the games run more or less the same as they would on the Deck itself with great visual quality. A 1080p TV should work the same if not better.
As long as you render the games at the Steam Deck native resolution (i.e. 1280x800) and use the FSR upscaling option this works perfectly. I do this to output to my 4K TV and the games run more or less the same as they would on the Deck itself with great visual quality. A 1080p TV should work the same if not better.