I’d imagine that in 100 years from now, technology will be far beyond what we could imagine! I think that the movie with Tom Cruise in which he is arrested for even thinking about committing a crime may be possible, or even using robots/life bots to do our bidding for us: communicate with others or meet them (life sized body replicate of ourselves would take on our daily tasks of communication to allow us to multi-task elsewhere) .  Others mentioned teleportation, holograms, holographs.  I also forsee real-time chats in virtual space with 3D imaging.  All Star Wars, Deep Space type of holograms and Futurama predictions.  I’d also suspect that our mobile devices will be no more, unable to handle the complexity and scope of collaboration that could take place worldwide!  Its quite amazing to predict and think about.