http://thenextweb.com/gadgets/2014/03/24/meet-nymi-authentication-wristband-one-first-wearable-devices-im-actually-excited/#!BhfyR

The way I see it, if Apple acquires this, they could make a huge dent in how we interact with services. They already have TouchID and the motion sensor in the iPhone 5S. If they combine that with this and launch an iWatch with the appropriate APIs, together with iBeacon Apple might just own the future, again.