I think the difference between today, and the past is the rate of change, and the barrier of entry for a displaced worker to move. The industrial revolution happened over decades, but the digital revolution happened in just a few years. People are being displaced first by 3rd world countries, and second by machines which is faster than they may be prepared to deal with. Additionally they may not be capable of making the jump. Its easy to take a farmer and place him in a factory. However it is slightly more difficult to take a factory worker, and put him in a web development shop.