[Dysiode]

I'm actually surprised no one has mentioned Rainbows End by Vernor Vinge yet. He actually presents a vision of a very natural, expressive near future UI.

While he doesn't go into technical details about everything, he does describe interacting with "Ubiquity" through small gestures throughout the body, whether small shrugs or interacting with hands. Further, he touches on the issues surrounding flat interfaces and even the virtual 3D interfaces.

And that's just the UI side of the novel.