I'm sure you can run SteamOS on the desktop just as well, though in my case all the games that I want to play are either older or new-but-graphically-undemandin

I'm sure you can run SteamOS on the desktop just as well, though in my case all the games that I want to play are either older or new-but-graphically-undemanding. And even for new and demanding games, PC games always have options to just turn the graphics down, which is fine by me.