Sam Altman is tech's next household name -- if we survive the killer robots

Sam Altman may be tech's next household name, but many Americans probably haven't heard of him. To anyone outside San Francisco, Altman would probably seem like just another young tech CEO. He's a Stanford University dropout who sold a tech startup years ago for a fortune, and he's spent the past decade investing and coaching other entrepreneurs. He posts confident and sunny life advice on Twitter and peppers his conversation with references to line graphs. But in the past three months, Altman, 37, has rocketed to the top of the tech industry's power rankings on the back of OpenAI.