This is a new concept launched by Home Plus Korea (joint venture between Samsung and Tesco). Products are displayed in public places with QR codes beside, shoppers simply scan what they want with their smartphone, and then choose a delivery time direct to their home. The scheme was originally trialled on a small scale but has recently expanded to many locations around the city, the concept has also won some awards and been recognised around the world for its creativity and boundary-breaking strategy. You have to wait for trains, you can now use that time to do the shopping, the layout enhances the user experience that is already delivered online as items are shown in real size and side by side.
I love it. But have yet to try it.