[moocowduckquack]

AR is any augmentation of senses, so a wristwatch is AR for your sense of time for instance. Google glass doesn't do predator-vision, but it can augment stuff like memory or positional awareness.

[Aloisius]

AR integrates computer-generated sensory input realistically into reality.

A wristwatch and Google Glass are no more AR than a piece of paper with a map on it is.