Jeff Bezos, Elon Musk, Marc Benioff and Mark Zuckerberg all have something in common other than being billionaires — they all invest in a robotics company called Vicarious. CEO Scott Phoenix says Vicarious aims to move robots from devices consumers buy to a "Robots-as-a-Service" business model. Consumers use them for a while and return them, and Vicarious uses AI to teach them new tasks.