AR is difficult concept to explain
Nothing beats actually showing it in action so here’s a video.
I employed a 3D modeller to create a model of a modern house then had it wired to the Vuforia SDK for my iPhone and iPad. See the house virtually appear and orientate right in front of you through the screen on the portable device.
Now imagine sitting around the dining table with your family and having a closer look at what could be your future home before you building it.