Uber's Next CEO Has to Face This Huge Challenge

Bradley Tusk, founder of Tusk Ventures who was an advisor to Uber, remembers the first time he met Travis Kalanick more than six years ago. "I'll never forget this, because it was so crazy it turned out to be true," he says. Kalanick told him that he envisioned a future in which no one would own cars -- vehicles would drive themselves and passengers would summon them by pushing a button. "There's no one in the world who's done more to make that a reality than him," says Tusk. News broke on Tuesday that Kalanick would step down as CEO of the company he founded roughly eight years ago. Since Uber's inception in 2009, venture capitalists have poured money to stake a claim in Kalanick's vision of the future, making it the most valuable startup in the world worth nearly $70 billion.