Please, as you have the time, either read the book or view the movie. My reluctance to engage in looking into the future is based upon this work. Arthur C. Clarke, the father of the geostationary communications satellite, and one who is as smart as anybody, completely missed the mark back then. Why should I think that I might do better?
One thing that he missed, and the point of my comment, is the emergence of a technology that could have been imagined then, and in a way came out of left field, e- mail. In one of the early scenes of the movie, one of the main characters makes a video-phone call home and ends up leaving a message with his four or five year-old daughter, not a message on an answering machine or in one of the many other ways that one can briefly communicate with another these days, no, Professor Hayward had to rely on his kid to remember to tell his wife something! Future my foot!
See: http://sorry.vse.cz/~xlizt01/refer/odyssey.html