It's funny because I already play console games and use Windows 8. What Valve is doing here is the very definition of unnecessary change, because.. This is basically spot on. Valve is using their muscle to create their own walled garden, in response to Microsoft doing it. Gaming is fragmented enough already, this is just going to add to the platform bias that's already stupidly common. I can see it already, new Valve games being SteamOS exclusive. Because how else are they going to get people to migrate? And having to have a dual boot with SteamOS is worse than EA games being Origin only. I'm far more excited for the prospects of Mantle than the idea of SteamOS.