One of the most interesting and unique technologies we saw at Eureka Park at CES came from Displair. This company is the inventor of the first interactive airborne display, by the same name, complete with multi-touch support. This is perfect for anybody doing advertising, promotional campaigns or anything else that needs the "cool" factor. The best thing about Displair is that the image stays totally penetrable for physical objects. For example, we got to see a demo of Fruit Ninja and were able to slash those fruits into oblivion by slicing through the screen. This is a really great product that you've just got to see to get it.