They are everywhere I turn. Yesterday I received this Dominoe's Pizza leaflet through my door and, as you can see below, even IT has a QR code on it! You can scan the code with your smartphone to order pizza.
At letting's agents...
While shopping at CEX & HMV for dvd's & blu-rays....
I found these new release anime DVD's and they looked really cool. I automatically thought to myself, "Ok, I'll remember the title, go home, and watch the trailers for them online. If I like the trailers, I'll think about buying it."
Now you can just scan the QR codes on the back of the cases and the trailer comes up on your phone. I watched the trailer right there and then in the shop!(requires internet/wifi connection)
Amazing. Convenience + Great advertising.
These codes can be used by so many outlets and is an exciting preview of what the future holds for advertising.