Augmented Reality Games: There’s been plenty of them in the mobile space and both Sony & Nintendo implemented AR features into the Vita and 3DS respectively. However, the AR gaming industry is still yet to gain any real traction. I dare to say this is often because the developers making AR games are using AR as a sales hook for an otherwise mediocre title. Most of the time there is no real reason to include reality in a game. Its annoying for the player to have to print out a marker, and it makes no difference to the gameplay or story that I can see sprites on my coffee table or desk.
This great video by Penny-Arcade.com gives a good oversight as to what they are, whats wrong with them and why. Anyone developing an AR game should be paying close attention to this video.