Microsoft's new CEO is Satya Nadella. He will replace Steve Ballmer immediately, becoming only the third ever CEO of Microsoft. As expected, Bill Gates is also stepping down as chairman and assuming the new title of Technology Advisor, which will "substantially increase" his time at the company. Nadella is a Microsoft veteran of 20 years, where he has mostly worked on enterprise-facing products (cloud, server, tools) -- but as far as the industry and consumers are concerned he's a relative nobody.