I highly recommend this series that's airing on the Science channel for anyone who wants a reason to feel optimistic about the future. It highlights emerging technologies--this episode happens to be about machines. The episode highlights Google's self driving car, mind controlled wheel chairs, artificial intelligence and the H.U.L.K. suit developed by Raytheon which allows a person to carry the workload of three men. This type of technology is the stuff that drives real growth, and will eventually make worries about Europe look totally foolish and transitory.
Back of the envelope, Google's self driving car could be worth $2T+ in market cap.