Giving the user content that is relevant to the physical space they are in at the moment makes a lot of sense. We are creatures of habit. While we love the reach of the Internet, we also want to be able to find things in our local area easily: people to meet, cafes to frequent, interesting buildings and museums to learn about.
http://www.smashingmagazine.com/2010/03/08/entering-the-wonderful-world-of-geo-location/