The release of Steam on Ubuntu was a precursor to this. Valve encouraged developers to port their games to Ubuntu and ported their own games. It is unlikely tha

The release of Steam on Ubuntu was a precursor to this. Valve encouraged developers to port their games to Ubuntu and ported their own games. It is unlikely that they would do that again. This will likely be a linux system with gnu userspace for now, even though they would have a custom UI.