My Sony TV is just a TV, and that is the way I like it, no apps, no internet; just channel buttons. Currently I am watching "Starwars II: Attack of the clones" in high def and commenting on this post at the same time.
Two screens are a far better experience than trying to both large video and interactive apps in one device. This is one of the reasons that interactive TV has never taken off. It just isn't feasible for general consumption.