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Bill Gates, chairman and founder of Microsoft Corp., left, and Warren Buffett, chairman of Berkshire Hathaway Inc., walk the grounds during the Allen & Co. Media and Technology Conference in Sun Valley, Idaho, U.S., on Thursday, July 12, 2012. Media moguls gathered at the annual Allen & Co. conference have spent recent years contemplating how to cope with technology companies drawing audiences away from television and movies. Photographer: David Paul Morris/Bloomberg via Getty Images

Bill Gates, chairman and founder of Microsoft Corp., left, and Warren Buffett, chairman of Berkshire Hathaway Inc., walk the grounds during the Allen & Co. Media and Technology Conference in Sun Valley, Idaho, U.S., on Thursday, July 12, 2012. Media moguls gathered at the annual Allen & Co. conference have spent recent years contemplating how to cope with technology companies drawing audiences away from television and movies. Photographer: David Paul Morris/Bloomberg via Getty Images