I read a post about mobile payments and thought why not record my thoughts.

The question is what will the winning payment solution be in the end. It must be simple, fast, security (increasing with value) and able to support various payment options.

Smart Cards are said to be a viable mechanism to make it happen. Mobile phones grab the lime light. I think we end up with 4 cards each representing a measure of security that we can interface either through a 7816, 14443, magnetic stripe or ...

We can write what we want to these four cards the party that provides the trust (MasterCard/Visa, Government ... )

Our Mobile device slowly replaces the wallet as it absorbs the content and reduces it down to graphic images and blocks of information.  Our screen is the size of today's card and will offer forensic specialists to recognize that it is a authentic image of the card they issued.