And I also mentioned iPhone ARKit, an interesting open source project to facilitate augmented reality development for the iPhone. What happens when you merge the two together? this -
It was created by a Japaneses developer going by the nickname mswar, by forking the iPhone ARKit source code and adding OpenGL and GPS geo-positioning. I don't call it augmented reality, because it has nothing to do with our reality, but I do think it has a potential to supply some moments of fun.
More details here (in Japanese).