The Museum of Science and Technology in Syracuse, NY has one of these - despite moving out of Upstate NY a while ago and living in other cities with much bigger

The Museum of Science and Technology in Syracuse, NY has one of these - despite moving out of Upstate NY a while ago and living in other cities with much bigger, higher budget science museums, it's still one of the most memorable and interesting exhibits I've ever seen at one. They also had another interesting project using a kinect-enabled display, where you could stand in front of a screen showing a Jurassic scene and throw dodgeballs at velociraptors. The original plan was actually to sync the experience to another display in a museum in Boston, so you'd be playing raptor dodgeball with the other exhibit's patrons over state lines - unfortunately, the other museum never set their half up. I think that speaks to the question commenters are raising here about why these aren't more common or commercially available. A lot of cool stuff like this is tied to the Kinect and comes with non-trivial setup and maintenance cost.