Expect to hear a ton more about this tech soon.
http://www.loopinsight.com/2014/01/31/major-league-baseball-rolling-out-thousands-of-ibeacons-for-opening-day/
http://www.loopinsight.com/2014/01/31/major-league-baseball-rolling-out-thousands-of-ibeacons-for-opening-day/