I tend to link to this too much, but see Hyper-Reality.[1] Augmented reality for the job monkey, out of Medellin, Colombia. After viewing that, read Marshall Brain's "Manna", if you haven't already. Then visualize the two linked together.

The killer app for augmented reality may be the bossing around of humans by computers.

[1] https://vimeo.com/166807261 [2] http://marshallbrain.com/manna1.htm