I thought it would all kind of be fun. Debit and credit cards could be incorporated. And they could be put in a place chosen by the recipient. Some would choose the palm of the hand. Some would choose the lips. Some would choose the buttocks. Some would choose the nipple. Some would choose their genetalia.
At the end of the checkout, if you had a nice looking cashier that you wanted to convey a little flirting with, you could have them scan you where your secret place is. Or they could just put one on everyone's bottom, and you'd just sit on that little laser scanner they already have there. But, for some people, we would have to make double and triple sized scanners, and prop some of them up with timber shoring to hold the weight.
We could shorten the discovery process in dating by having a record of marriages, divorces, children, tpo's, criminal records, etc. One scan would shorten the process down to either "Goodbye" or "Wanna see my golf tee collection?"
You'd know all about the people in your PTA or scout group.
You wouldn't have to worry about forgetting your credit card or car keys.
You wouldn't get the wrong meds in the hospital. If found unconscious, they would know all about you.
Lots of things.
Steve