I just reviewed the first book in J.D. Robb's In Death series and since it is set in the future, I started thinking about all the things that the future is supposed to bring in fiction. My favorite thing is probably that Autochef in the book or the fact that tabacco is illegal but that's just from Naked in Death. I haven't read too many futuristic novels but there is usually somthing I think is particularly neat in each one (the hoverboards in Uglies for instance).
Do you have a favorite invention or something that you found really interesting that was in a futuristic novel? What book (or series) was it in?