Cash or plastic? How about fingerprint?
Biometric transactions are faster and more convenient -- and closer than you may think.
...It works like this: You register your fingerprint and your bank account with a service provider. The main ones are Pay By Touch and BioPay.
When you shop at a participating merchant, you just swipe your finger and the payment is automatically transferred from your bank to the merchant -- you don't have to hand over a card, sign a receipt or punch in a PIN...