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Robots can already do many jobs more quickly and efficiently than humans. Soon, they may be better than us at many more tasks. In Silicon Valley, plans are underway for massive changes in the workplace – prompting fears that millions of people will be replaced by robots and AI. So, will this future bring freedom from work in a world of unlimited resources or a dystopia where millions of workers are discarded and impoverished? Reporter Richard Bilton investigates the rise of the robots and what it could mean for all of us.