THIS is what bitcoin needs to be a viable currency.
It needs a powerful GPU in every living room calculating while idle. This kind of strategy is the only way the public will ever gain substancial confidence in bitcoin.
Yes, I'm sure that's the one thing keeping the public from having confidence in bitcoin. I know when I think about a currency, I'm like "Man, but that doesn't eat up a bunch of power in my house for no reason. That's not very secure."