I've read that some companies are making very basic tablets for dirt cheap around the prices he mentioned, now considering the U controller will have no processer and such and just stream I think he's on the ball here. The controller will have a camera, touch screen and probably a place for headsets to be plugged in but not much else as it's a wireless controller that just streams, people shouldn't think of ipads and so on as those have much more going in them.
As for the price of they hinted 250 which I think is a brillient price and makes sense as expensive for Nintendo is normally between 250-300, lol at the journalist saying he thinks it'll be 600 what's he smoking.