QR Codes have been around for a while, and people are continually coming up with new ways of using them. In Korea, one grocery store chain has done just that. In an attempt to increase market share without adding new storefronts, Tesco unveiled a virtual storefront in subway stations, using QR codes as a means of shopping. Customers scan the codes using their smartphones, pay online using a credit card, and enjoy having the products shipped directly to their homes by Tesco! Check out this video demonstrating the process: