I don't know if any of you remember back in the early 2000s when grocery carts had little computers on them, telling you where items were in the store? I don't know what happened to those, but they were super helpful. All you needed was a little digital shopping list and you'd be all set.
Apparently Nintendo thought the same thing since it recently filed a patent for a DS application that would not only keep track of your must-have items, but it would also wirelessly sync up with your grocery store and give you a birds-eye view of your location, and where to find the ingredients you need fast. It's like gaming, only, it's real life.