That's a non issue. Valve would be stupid to start making Linux only games. The SteamMachine is for people who would want to play pc games in their living room but who don't have a PC anywhere close to connect it to the tv.
So now, they can get the Steam Machine. But since Linux based games on Steam are still a minority, people might say they don't want that "console" if it doesn't have much games so Valve set it up that you can stream every windows based game from your pc that can be anywhere in your home via lan to your SteamMachine.
That's a non issue. Valve would be stupid to start making Linux only games. The SteamMachine is for people who would want to play pc games in their living room but who don't have a PC anywhere close to connect it to the tv.
So now, they can get the Steam Machine. But since Linux based games on Steam are still a minority, people might say they don't want that "console" if it doesn't have much games so Valve set it up that you can stream every windows based game from your pc that can be anywhere in your home via lan to your SteamMachine.