Pickbe Stores, using QR Codes,  are located in the Diagonal Metro Stops and Metro Sagrera in Barcelona, Spain. Very interesting idea, use large LED televisions to present products that can be purchased by scanning a QR Code. The displays can easily be changed depending on the season or even the time of day!

I suppose you could add a trackpad to the display or QR Codes that send SMS message to the computers controlling the televisions so the user could select from various product pages by simply scanning the QR Code or swiping the trackpad.

Source: Pickbe.com