A few months ago a French company called Evigroup introduced the Paddle Pro Windows tablet with head-tracking technology. If you’ve been scratching your head trying to figure out what that means, the company has released a demo video showing just how the head-tracking works.
Basically, the camera on the front of the display detects your gaze and displays a circle on screen showing the area you’re looking at. You can control it by moving your head. If you reach out to the tablet to use your fingers, the circle disappears.
Since my French is pretty bad, I haven’t figured out exactly what you have to do to click with your head, but the user in the video clearly demonstrates that it’s possible to not only move the cursor, but also to open and close programs and perform other actions without touching the tablet at all.
Update: It appears that you click by holding your head steady in one position for a set period. The default is 800 milliseconds, but you can adjust that setting.
The whole thing looks pretty cool while the tablet is propped up on a tablet, but I have to wonder if it would even be possible to use the head-tracking feature while holding the tablet on a bumpy bus ride.