Nothing actually! they want you to install steamos, so the OS marketshare ISNT only windows! You can turn your machine into a steam machine TODAY! (if you dont have nvidia graphics, theyre working with nvidia on that.)

1. Wrong resolution for the hardware2. The game itself is poorly optimized for Linux, which Steam Machine is running. Even many updates later it still freezes with Environment Texture Resolution above low. RayTracing or upscalers crash the game.Steam Machine despite its flaws is still a good choice for people who want to own a compact PC but don't bother themselves. It's just that "smart" (actually retarded) people are very loud