Its easy to implement a camera on a GPS. It would be most useful if using Google maps to point to a location we would get the QR code for that location and print some calling cards to give our friends/customers. They could then get to their cars, show the calling card to the GPS camera and automatically get the directions to the holiday house, the nice beach bar or the amazing restaurant. This is so simple I that it can't be called a thing of the future.
I would also use QR codes to automatically point a telescope to a star/planet.