Virtual grocery shopping - I like it

Something I never quite understood why it shouldn't catch on is the concept of online grocery shopping with scheduled delivery. Aside from produce and other fresh food, where personal selection is usually preferred, I see no reason why people should have to drive to the store to pick out standard grocery items, stand in line to pay and get it home while we could be doing much more important things.

In South Korea, this idea took off quickly and you can now grocery shop while waiting for the subway by looking at products on a wall-length billboard with photo-realistic images of essential supermarket supplies. You order what you want by snapping pictures of the QR code representing the item. Tesco delivers your order to your door at a time of your choosing.