SteamDeck hasn't been released yet and it's coming to a limited number of countries, first. With the supply constraints, it's likely that it would take two or more years for SteamOS to have any noticeable market share. And, that is if SteamDeck is a success.
The market for the SteamDeck seems less around the 'Gaming PC' market - and more as a handheld pc. Essentially to bring the market accessibility of PC and 'desktop/laptop' games to a handheld factor. I don't dare take a laptop with me to work to play games on at lunch, but something the size of a Switch with my already existing library? Yes please!
It feels like this is a good way to market the device for potential future plans where Valve could build other niche hardware that would improve the viability of Linux for gaming devices on other hardware.
