Before this takes off, I wanted to clarify that this was NOT what was discussed at the panel. Random guests will not be trying to locate other guests.
What it is:
Data regarding your performance on the rides will be stored (on a server, and identifiable through your Magic Band, or Disneyland equivalent). Your performance on the rides affects your "reputation". Someone earlier suggested Disney misled us by including a bunch of Star Wars characters in the concept art. That was not misleading. A bunch of droids and other creatures will be roaming the land.
As a for instance (probably not the case, but something along these lines):
You did a terrible job piloting the Millenium Falcon. The ship has returned wrecked. After you leave the ride, you go to the cantina. Sensors that detect Magic Bands are hidden all over the restaurant. Suddenly, an animatronic shouts: "Mark, I saw the junk-mess you brought in. Deal's off. You're not flying my ship!"