It's nothing new either - you could have rent the setup for the game for at least a couple of years. The company behind it writes:
The setting is very simple: a reflector on each foot is the only physical tool to interact with Sportpong. The interface is integrated in the field which is projected on the floor. The players control the game with their feet, nothing else. This control is intuitive, naturalistic and very direct.
I really, really, can't wait to try it out. Last year I had a session of Atari Pong (the first in twenty years) and enjoyed it immensely. This looks even better. Would be great having it on ARE or ISMAR.
More details on sportpong.ch via SwissMiss.