Check out how this Korean grocery store is using QR codes to create a virtual store in a physical space and eliminating the need for in-store staff.

“Consumers will be able to order and get delivery of 35,000 products, ranging from milk, egg, pasta sauce, gochujang [Korean red pepper paste], tissues and digital cameras, by simply pulling out their smartphones and scanning QR [Quick Response] or barcodes of products shown in the subway station with the Homeplus app,” – Homeplus CEO Lee Seung-han

Brilliant: http://koreajoongangdaily.joinsmsn.com/news/article/article.aspx?aid=2940729