SAN FRANCISCO, CA - OCTOBER 06: (L-R) Tesla Motors CEO and Product Architect Elon Musk and Y Combinator President Sam Altman speak onstage during "What Will They Think of Next? Talking About Innovation" at the Vanity Fair New Establishment Summit at Yerba Buena Center for the Arts on October 6, 2015 in San Francisco, California. (Photo by Michael Kovac/Getty Images for Vanity Fair)
