It's a gimmick, sure, but it's a neat one: this is a sheet of water vapour that, thank to some fancy add-ons, has been turned into both a screen and a touch-screen device. Letting you get your Fruit Ninja on.

As you can see, the controls work pretty well! I mean, it's also entirely useless, especially since it costs $10,000, but hey, it works pretty well!

Playing Fruit Ninja On The Displair At CES 2013 [Jason Gilbert, via Touch Arcade]