Like the majority of gamers, I’m forever searching for new ways to make my Fallout 3 pornomachina more interactive. That’s why the idea of holography — projecting video images into 3d space — is so fascinating. But what good is just seeing a dancing, ah, object in space if you can’t touch it as well? Or more important, if she, ah, it can’t touch you back?

The answer? Projected ultrasound, aimed and tracked by Wiimote.