The Big Switch may turn off jobs. Oh Really?

Throughout human history with every advent of new technology there has been a small collection of naysayers to say that ‘this new technology will destroy hundreds of thousands of jobs’ where in reality it has created just as many new jobs as it has replaced. When automatized car production was rolled out, the workers could simply retrain as technicians to service the new machinery. Some will argue that the advent of Web 2.0 destroys more jobs than it creates but if we as a race adopted this kind of attitude then perhaps we might still be hunting big cats with big spears and retreating to our caves when the sun goes down.