As I wrote earlier, eBay is also betting on the emergence of the digital wallet. Long-term, money - a digital signal - will be handled by software, rather than dedicated hardware, but the Square solution might succeed as a short-term stop-gap effort to get small businesses onto the mobile transactions bandwagon.
I wonder how IPv6 is going to affect the picture. Ideally, you would just "ping" your money to the vendor, without any credit cards at all.
tags: money, transfer, payload, control, greatest, infrastructure