One way is combing augmented reality and social networking with Glass. There are a number of cool things that come of this.
One is being able to look at someone also using the Glass app and being presented with their profile, plus options to send messages or view more information. It may even be possible even if they don't have Glass using a combo of geolocation and facial recognition. The most exciting bit is sending a message between two glass users because it'd be pretty much like telepathy.
When the 'internet of thing' comes about, it may even be posdible to control all your various devices without lifting a finger. I could look at my kettle from across the room and flick it on!
There are tonnes of possibilities and I think, especially when it's on a contact lens, it will make what's currently considered magical (telepathy, psychokinesis, etc) a reality, just like the plane removed the magic from human flight.
I think wearable computing opens up many exciting doors and the two thoughts above only scratch the surface of the possibilities I imagine.
In fact, I feel so strongly about ot I'd emigrate to the US just to get my hands on this awesome tech. I need to get onto it ASAP.