This kind of thing is such fun! See: http://www.popularmechanics.com/technology/engineering/news/110-predictions-for-the-next-110-years
I have a book from 1890 with predictions by people such as Westinghouse for the year 1990. A lot of them were smack on target. In some ways it is not so difficult to predict the future. The latest issue of Sci. Am. is devoted to future predictions. Most of the authors wimped out. They did not even take a stab at future computers. One of them said that space-based cities would have to have low pressure, which might affect the health of children. What a nitwit! Does he really think we can build cities in space but we can't develop materials strong enough to hold 1 atm of air pressure? - Jed
