I'd love that as well. But what does Valve has anything to do with it? If it's an open platform, it probably isn't a good idea for them to tell developers to do it their own way. It's up to the developers to decide that.
Indirectly thru the values of this Steam box. If most of the hits on this box are not graphic rich but very gameplay or story rich + hardware is mid-range + shiny tools for story, AI and multiplayer it will inform developers to most of their games in one way.
