Set to be unveiled today, the much anticipated Bloom Box—a residential "power plant" about the size of a mini-fridge—could provide cheap, environmentally friendly electricity to U.S. households within ten years, according to Bloom Energy, the company behind the fuel cell based invention. But what, besides its hype, makes the Bloom Box special? Could it really revolutionize how we power our homes? And do Bloom Energy patents point to a secret killer app? In an interview with CBS TV's 60 Minutes Sunday night, K.R. Sridhar, CEO of Bloom Energy, said that, for one thing, the Bloom Box fuel cell system is...