According to Apple’s definition, iBeacon is a “New low-cost and low-power technology capable of detecting the near presence of a Smart phone device”. This technology, based on sensors, allows that a specific Smartphone runs some pre-defined actions when this is close to an iBeacon.
Locating iBeacons in different rooms of the house could make that every time we enter into a specific area, the device could be detected and the lights or the heater could be switch on.