Bezos is the ultimate disrupter: He has upended the book industry and displaced electronics merchants. Now Amazon is pushing into everything from couture retailing and feature-film production to iPad-worthy tablet manufacturing. Amazon even sells ultracheap database software for businesses. (Oracle (ORCL), take note.) He’s willing to take risks and lose money, yet investors have embraced him, pushing Amazon’s stock up 30% so far this year. And even as Amazon expands and experiments, Bezos remains zealous about delivering a good customer experience. For all these reasons and more, Fortune has named Bezos its 2012 Businessperson of the Year.