I’m sure most of you reading this post are aware of the new SteamOS 3.0 that’s shipping by default with the Steam Deck, with that much-needed interface overhaul for Big Picture Mode (also, it’s Valve’s first product to hit the number 3). Well, thanks to Reddit user GB_2_, it’s possible to use the new Deck UI across any Windows or Linux desktop. For Linux, all you literally have to do is: