http://www.youtube.com/watch?v=Z7gzcVSLZoU

The Secret Sauce In Square’s Starbucks Partnership: Discovery, QR Codes

Interesting that Square, who already have a sophisticated payments platform established, should feel the need to include QR codes. This way the customer supplies the hardware/app combo, the merchant only needs the scanner to read it.

I expect more merchants will join a Passbook type payments services.