Here is an interesting video by Common Craft explaining Augmented Reality. However I know about AR but there were still allot of people who never heard of it. I even tested augmented reality on my own laptop and also tried making own AR with Flash. However it is a big thing in the future it will be implemented to be able to help making life easier but also making life more interesting. Think about games that actually interacts with the world around you, depending on where you are the game levels are different. Think of Mario jumping on your furniture and on the walls instead of Hopping in a 2d space.