Lots of interesting stuff going on in this space. Shadow cities is another one that's doing pretty well. The big question to me is, where's the Zynga of this world? Can you make casual location aware ARGs?
Foursquare is close, but it doesn't feel like a game at all.
Plus, those were the only two game mechanics I saw - I could battle things, and then I could click on nodes, and neither really seemed to progress me anywhere.
I feel like that game should have had a much more thorough tutorial.
http://www.qualcomm.com/solutions/augmented-reality
https://ar.qualcomm.at/