The promise of smart glasses has been the source of buzz in the technology sector for some time. We have seen excitement over various products, starting prominently with the introduction of Google Glass in 2012. Since then, the market has gotten quite crowded with products from Realware, Vuzix, and Microsoft, to name a few. Smart glasses create true extended reality/mixed reality (XR/MR) experiences for users. In contrast to virtual reality--which totally submerges the user into a computer-generated world of visual and audio stimuli--XR/MR overlays information onto the user's view of real world. Smart glasses make science-fiction experiences like those from the movies Terminator and Iron Man a reality.