Which is why I listed several Microsoft dependent technologies that Europe kingdom guards have to stop the merchants from Microsoft kingdom trade at the borders.
Without wagons carrying Windows game boxes, there is nothing at the SteamOS theater to play, and then the actors have to actually come up with their own original plays.
As for Proton, don't build castles on foreign kingdoms => OS/2 "runs Windows better", Netbooks.
Lets see how long Valve manages to keep their castle up.