Sure the geofence triggering is kinda cool, but I've yet to see a practical use of it. Seems like "interactive museum tour" is the thing everyone keeps coming back to. If this is what Apple wanted to do with iBeacons, they would be selling them for a couple bucks in Apple Stores. But iBeacons aren't a consumer device. I think much more likely to see "iBeacon ready" hardware sold by Apple and other 3rd parties.
I think iBeacon protocol will become part of other devices, as a way to add proximity detection for the iPhone/apps that could interact with that device.
How about a DSLR camera that I can pair with by touching my iPhone to it? Creating ad-hoc multi-peer networks between devices by being near them. Play a game on your phone on a nearby TV without connecting to same WiFi. Or wearables knowing which other wearables are nearby. This kind of natural, "magical" interaction is very Apple.
Isn't it what NFC is for ? Except for Apple stubbornly deciding not to add it to the iPhone ?