lots of vertical specific use (Score 2)

think about it for a second:
- carry a specification and repair manual in a wearable computer, display through visor (Boeing does this today).
- wearable data collection devices are widespread in warehouse environments
- wireless units for field service technicians, complete with repair procedures, notes, etc.

Wearable computers for consumer use is still in it's infancy, at least until they become embedded in other things to truly be pervasive.