A store app for consoles where you can access your games on the consoles itself similar to Xbox Live Arcade, Nintendo WiiWare, or PlayStation Now. I know the chances are extremely slim (Valve's Steam Box, it would compete with their proprietary service, and compatibility issues galore), but I like thinking about hypotheticals like this. If something like this were to happen, I can see Xbox getting it because it's OS is based on Windows. Now if it will be able to run the games is whole other thing.