You need like near perfect internet for that to work. Lag is very painful even as of now. Nobody in a developing country, or even just a less-developed neighborhood in a developed country, would be able to play.

Wanna play on your steam deck in the subway? Nope (afiak internet still non-existent tunnels, or very shitty if it exists). Going on a trip to some remote place and wanna game a bit? Nope. Boring flight? Nope.

People are gonna hate it.