The NGP has some pretty crazy location-based capabilities, mostly embodied in an app called "Near." Near tracks your location, and makes an ongoing map of where you've been. In case you were wondering .... where you've been.
In terms of games, Near connects with PSN, and finds out what's popular among other users where you are right now, as well as what other people nearby are playing. You can even buy games right within that interface! If you stumble into, say, a place where people are playing Hot Shots Golf all the time, you can just buy it right then and be ready for the next impromptu tournament.