For this MLB season, iBeacons have been installed in 20 of the 30 stadiums around the United States. They will be used to check fans into the stadium, show the fans where the nearest entrance and exit is, provides concession information, maps, video clips, and the ability to upgrade your seat. The only issue is that the iBeacon will only benefit people that have an Apple device.
I found this information on http://www.engadget.com/2014/03/28/san-francisco-giants-mlb-ibeacon/.
iBeacon is also being used by teachers to automatically take attendance as the students enter the classroom. This ensures that every student is accounted for and that the students cannot play hooky. Students can also use the iBeacon to ask questions about assignments.
I found this information on http://www.psfk.com/2014/04/ibeacon-class-attendance-app.html#!CFY0U.
iBeacon is also used for the way people interact with stores, parks, and museums.
I found this information on http://mashable.com/2014/02/05/apple-ibeacon-shop/.