You have to read that... If it works as it says it does, thats impressive stuff.
Basically, one mini, internet connected console for use on any game that is supported. No more console ports, etc, as the dedicated hardware online handles all the processing.
Only worrying factor I can see, is if the service ever went down, no more games, as everything is stored online (you'd pay for the full versions, or rent), and also, there would be times the service would fall anyway, due to demand, etc I'd expect.
But the concept itself is pretty amazing, and you have to agree with that.