Self-driving cars have long been a dream for futurists, but they came one huge step closer to reality this year, as California became the third state to legalize autonomous vehicles and Nevada issued the first license for testing them on public streets.
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How realistic is it that you'll soon spot a driverless car in the next lane over? Probably not very. But testing will certainly continue in 2013, and Google's Sergey Brin is optimistic, predicting that consumers will be able to ride in self-driving cars within five years.