This is amazing.
The second largest grocery chain in South Korea, Home Plus (formerly Tesco), has created an augmented reality shopping experience in the subway - where people could actually buy groceries and have them delivered right after they got home that day.
"With lighted billboard visualizations of the actual shopping experience, someone waiting for a subway who was armed with a smartphone with a QR Code reading app installed could order the groceries they needed without physically going to the store itself. They find the items they need, buy them through the app, and the groceries are delivered to their home."
(via Augmented Grocery Shopping: How a Korean grocer moved virtual shopping to the subway | Techi.com)