"Difficult to see... always in motion is the future." - Yoda, Empire Strikes Back
The future is hard to predict accurately. Some of the smartest people who've ever lived have tried their hands at it and failed miserably. To illustrate that, a poster on The List Universe recently posted a list of the Top 30 Failed Technology Predictions.
It's pretty interesting to see some of the predictions that have been proven wrong over the years.