Recently the world's largest marketer, Procter & Gamble, has been testing underground stores in four of the busiest subway stations in Prague. To purchase an item, consumers just scan QR codes of the products they want to buy from the subway walls. From there, the products will be shipped/delivered to their house within a guaranteed 2 day window. South Korea recently did something similar and they painted underground subway walls to replicate aisles of a shopping store.
Does it really beat going to the store yourself? I guess it depends on how busy you are. It's definitely progressive.
Will it work in the States? Maybe, but even NYC is only just beginning to have cell service underground. And it is limited at best.
So what do you think? Is the next big thing underground shopping?