Adventure, Science Fiction
Science Fiction
Yes, this is science fiction, although we sometimes wish it were science fact: those sm's would come in super-handy. Rainbows End spends a lot of time on the nifty gadgets and toys of the future, but it's not only about that: whenever Vinge imagines some new technological marvel (say, a cure for Alzheimer's), he also imagines how it would change society. For instance, all the medical technology means a lot of old people are still hanging around.
Adventure
If this book were just about how Robert is sad he can't write poetry anymore and all the family drama that comes from that, we would probably classify it as a "science fiction drama." But since it's about a super-spy's attempt to take over the world using mind control, we're going to classify it as an adventure. To be more precise: it's a spy/espionage adventure. Cue the Indiana Jones theme song.