Tesco has set up virtual grocery stores in subways and trains commuters for the busy working people to do their grocery while walking to work. According to Tesco, Korea has one of the busiest and hardworking people, therefore, taking an hour for a week for grocery shopping can be a real drag.
Tesco has set up plastered walls along the walkways of subways, and these walls are lined up with products containing a special QR code specifically for each product. All the shopped has to do is download an application to scan the QR code and will be directed a payment section and once he/she had paid, the groceries will be sent to their home. It is a big advantage to have your groceries delivered to your door in big cities where driving isn't a good option. It also saves the shopper's time for needing to go to a shopping market to single-handedly pick out their grocery items.
However, a downside for this virtual shopping is that shoppers are unable to see the product's information, shoppers can turn the product around to see it's nutritional facts. The consumers are also unable to tell the expiry date of a product, they can only take what the shop has given them. It is a small price to pay for the convenience.
http://www.geek.com/mobile/koreas-tesco-reinvents-grocery-shopping-with-qr-code-stores-1396025/