Quantum Computing

I was impressed by Mr. Ross, the founder of D-Wave, who gave an excellent interview about his company's development of the world's first quantum computer. He seems like a smart guy that knows what he's doing, and he explained complicated subjects in an elementary manner suitable for grandma or junior. I hope the Chinese haven't stolen all his company's secrets, but I wouldn't place any bets on that, because while the cat's been away fooling around with Afghanistan and Iraq, China has been stealing cheese left and right. I wish he had explained the reasons why the quantum computer apparently requires near-absolute zero temperature and complete shielding even from the Earth's magnetic fields. I'm not sure how practical that will be for home users, because keeping something that cold would require kilowatts of electricity, and the kind of shielding needed to protect against magnetic fields probably will be expensive as well.