From MIT:
…augmented reality has crept toward acceptance (see “Augmented Reality Is Finally Getting Real”). The arrival of smartphones, tablets, and head-worn computers like Google Glass—and improvements in the tracking technology that bedeviled Caudell and Mizell—are making augmented reality more useful,
via Companies Try Augmented Reality as Potential Worker Tools | MIT Technology Review.
I believe augmented reality has amazing potential in dentistry / medicine. The linked article is a good overview of how the technology works and the state of current development.