Can't stop hearing about it in the news, but wondering what makes "augmented reality" (AR) - the concept of overlaying computerized information, digital pop-up windows and/or virtual reality (VR) displays over real-world scenes and imagery - so exciting? Allow us to paint a picture. Imagine. You walk up to an airport terminal and breeze past the airline check-in. Afterwards, a wireless chip in your smartphone uses biometrics to verify your identity at a checkpoint, then a green arrow pops up and shows you the best path to the gate. When you get there, a blue circle shows you where to sit and helps you avoid the most common congestion points. You wait about five minutes until a soft chime tells you to get in line. The total time between drop-off and take-off: Just 20 minutes.