Spotify would be cool yes, however, how about integrating the entire experience more in the TV experience, instead of having a seperate NetTV menu and screen, what if I can have little applets on the TV while I watch TV, such as weather, news etc.
Or even better: From what I can see the internals of my TV are a small Linux device, what about opening this thing up so other parties can develop for it. I have a Linux based sat receiver, its incredible what teams like PLi and others can do. Or maybe have Boxee on it