Imagine your smart phone and "devices constantly scan for BLE and wake up relevant apps — even if they are closed — when they come within range of a beacon."
Frankly if I was at the store and that happened that would be my cue to find the manager and show a little disapproval. If it's some store I can do without, I will.
If it becomes a wide spread phenom then it's time to carry my own beacon.
More at http://en.wikipedia.org/wiki/IBeacon
Cameras that make great holiday gifts
Let them start the new year with a step up in photo and video quality from a phone.