Earlier this year, Apple introduced new Bluetooth 4.0 chips in the MacBook Air and Mac Mini lines. The chips include support for Bluetooth Low Energy, a specification which opens the door to a number of new kinds of Bluetooth-powered devices. In the specifications for the iPhone 4S, Apple notes Bluetooth 4.0 support is built-in.
There haven't been many products built for Bluetooth 4.0 yet, but there are a variety of possibilities:
- Find Me - electronic leash applications
- Proximity - wireless locking and unlocking, out of range alerts
- Sports / Running - stats and vitals
- Health - heart rate monitor, blood pressure, glucose monitors