[citation][nom]techcurious[/nom]If you just need to put your wallet (credit card) on the sensor to pay for the transaction, what are they doing to prevent someone from standing behind you in a crowd and discretely bringing a sensor (lets say on a cable attached to a laptop, rather than the whole laptop itself) to your wallet in your back pocket, to pay for their purchase?[/citation]
Because in addition to scanning your card/payment device, you also typically need to input a key-code.
Anyhoo, this is an interesting idea--probably a lot more pertinent for small-businesses wanting a unified work-computer/POS purchase transaction machine (assuming you can set up the pay service, etc. But for the average user/consumer...meh...I personally wouldn't seek out this feature, but if it's there, I couldn't care less.