Beginning Today, baseball card collectors who hold a special Topps 3D Live baseball card in front of a webcam will see a three-dimensional avatar of the player on the computer screen. Rotate the baseball card, and the baseball player avatar rotates in full perspective. The technology is called “augmented reality,” a combination of a real image with a virtual one.
Total Immersion is the company made the augmented reality technology available to Topps. It has already been used in a theme park and for some auto design work. Using the technology, card collectors see a three-dimensional version of a player and can play elementary pitching, batting and catching games using their computer keyboard.
General demonstration of Augmented Reality by Bruno Uzzan, CEO of Total Immersion.
Wikipedia: Augmented Reality