Remember when Elon Musk, speaking at SXSW in March 2018, scared the dickens out of us by warning against artificial intelligence (AI)? "The danger of AI," Musk stated, "is much greater than the danger of nuclear warheads ... more dangerous than nukes." Now comes yet another worrisome prediction, this time from Chinese venture capitalist and the world's foremost authority on AI, Kai-Fu Lee. In an interview to be aired this Sunday on 60 Minutes, Lee says that in as soon as 15 years, 40 percent of the world's jobs could be done by machines. "AI will increasingly replace repetitive jobs, not just for blue-collar work, but a lot of white-collar work," Lee tells CBS reporter Scott Pelley.