Also, this Steam idea has one fatal flaw. Being tied to linux means I will most likely never go there. I hate linux with a passion. I would rather work with Windows!
Since they are basically making a video game system out of a PC, I don't think you'll ever see a command prompt or even a pointer.
If you look at their latest front end, "Big Picture", you can kinda get an idea of how it will work.
This whole project is for gamers, not programmers so I have a feeling setup and operation with be more like running a Mac than a PC.