You can go back hundreds of years to see that new technology puts some people out of a job, but makes new opportunities for others.
I was watching a program about the history of London's bridges the other day.
For many years the only bridge across the Thames was the old London bridge, so if you were nowhere near the bridge there was a group of men who rowed people across the Thames in boats. They has their own union called The Company of Watermen.
http://en.wikipedia.org/wiki/Company_of_Watermen_and_Lightermen
Whenever a new bridge was planned to be built The Company of Watermen would complain and say it was going to put their men out of work, so they were paid a sum of money to keep them quiet.
Of course as more and more bridges were built across the Thames less and less men were needed to row across the Thames, so that now there are probably none.
However the increase in bridges has allowed London to grow and become one of the largest and wealthiest cities in the world.
But would that be the case if we still only had one bridge across the Thames?
With all new technology there are winners and losers.
See luddites
http://en.wikipedia.org/wiki/Luddite