I came across couple of videos recently on how User Interface for the future is going to be different than what we are used to. Its already getting changed as we get used to the touch screens and gesture recognition. Here is the first video that came out couple of weeks back and has already had over 2 million hits:
There is a whole blog post dedicated to this which you may be interested in, available here.
Another one is on the gesture recognition that will probably make big on the future devices including TVs.
On a lighter note, the future generation would probably just take the touch and gesture recognition for granted. Here is one such video: