Great way to dumb down technology...but I bet it leads to even cooler ideas. This vid of whiteboard pong is interesting for the first 15 seconds, but then you start to imagine what else you might do with it.
I think it makes for an interesting solitaire game. Maybe a right brain vs left brain competition. The winner gets to either compute a series of Bernoulli numbers or bake and decorate a cake.
Better yet, let someone with a multiple personality disorder try his/her/their hand at it. Now that's entertainment!