Jay Cruise writes "The world's first 3D gaming mouse was unveiled at the 2006 E3 Expo. The Game O' 3D gaming mouse offers PC gamers an 'unfair advantage' by allowing them to execute moves that are not possible using just a keyboard and a traditional 2D mouse. For example, in FPS, Game O' offers gamers a way to move forward, backwards, sideways, jump, crouch, pitch, yaw and roll without using the keyboard."
For a more cynical opinion, I submit to you Ars Technica's take
on the device. From that piece: "Your head just explodes. It's a terrible thing, and the nub on the side for some reason randomly makes you crouch. The man showing me the product was quick to add that you could set up the controls however you wanted. The software to do this even looked nice. This doesn't help the fact that playing a first person shooter with one hand is a bad idea. You'd still need a hand free to like, you know, reload? You could probably use those buttons, but in the demo they were set to look up and down. What if you're playing a game where you can peek around corners? You simply need the keyboard."