Either way, while this is possible (even considering privacy and libertarian standpoints), I don't see it being accepted until the "government" problem and even the big corporate spying problem are solved. And by solved, I mean really solved. The people are going to have to be fully confident at all levels before they will ever go that route. All one ever has to do is think of all the horrible ways for it to be abused and just a hint of fear will kill it hard and fast.
However, if we assume that's behind us, can we find benefits to what you suggest? Of the top of my head, the only one I can find is 'maybe' for people who don't want to carry any physical wallet around (dance clubbers come to mind), maybe those people could benefit. Other than that, I really don't see much hard benefit. Enlighten us though? What are your thoughts?
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