A Sample of Predictions from otherwise intelligent people...
"The telephone has too many shortcomings to be seriously
  considered as a serious      means of communications." - Western Union Executive, 1876
"I think there is a world marke for maybe five computers."  - IBM Chariman Thomas Watson, 1943
"There is no reason forindividua ls to have a computer in their homes." - Ken Olson, Digital, 1977
"640,000 bytes of memory ought to be enough for anybody." - Bill gates, 1981