Adding Twitter and Facebook to game consoles is a good idea, but both Sony and Microsoft are missing the point.
These social networks are tools that can be used for all kinds of things. Their usefulness to gamers doesn't spawn from the ability to learn in real time that your best friend's wife is psyched to see New Moon. Social networking on game consoles must make it easier to find and connect friends to game with. And the way that they're implemented now on Xbox 360 and PlayStation 3, they aren't coming close to doing that.
Microsoft's and Sony's implementations of Twitter and Facebook on their game machines are only leveraging a tiny fraction of their powers. That needs to change.