Well-implemented idea, as others have said. It's ridiculous that in 2013 I'm still carrying around a wallet full of junk (and keys but that's another story). H

Well-implemented idea, as others have said. It's ridiculous that in 2013 I'm still carrying around a wallet full of junk (and keys but that's another story). However this feels like an awkward stop-gap between the current card-payment system and online payments. I don't want to give a waiter a piece of plastic and get a little paper receipt back, give me some kind of abstracted account ID and I'll transfer you the money from my phone/laptop/smartwatch/glass (/whatever we'll all have by the time a new payment method is sufficiently penetrant to be useful).