I don't understand it from neither a sharer, or a browsers perspective.
Although it might be hard on the battery, getting a push notification whenever I approached a hub of activity would also be very intriguing. (As long as it isn't the shirtless greeter at Abercrombie & Fitch.)
I've lived in the same country all my life, and I still discover new, interesting things in it.
(On another note, people who snap photos in restaurants should be punched in the face.)
The underlying technology sounds like it could be useful for everyone from Facebook to the FBI, but the service itself has more buzzwords than users in my area, and I don't see too many reasons why that state of affairs should change dramatically...
Answer: probably not enough to warrant a $41m investment.