The Logitech MX Air Mouse has a really neat feature; you don't need a desk to use it. You can hold it in the air like a Wiimote and use gestures to move the mouse cursor.
Performance
- Laser performance: On your desk, enjoy laser-precise tracking and instant response.
- Freespace™ motion sensing: In the air, use MX Air™ to browse and play your favorite media. The sensor transforms hand motions into natural, responsive cursor controls. Adjust volume by waving to the right or left; skip tracks with a flip of the wrist.
- Scroll panel: Experience hyper-fast scrolling at the touch of a finger—on your desk or in the air.
Control
- Easy control of PC-based entertainment: Take command of your PC-based media with intuitive wave-and-click control—an easier and more natural way to enjoy your favorite media.
- Gesture controls: Control playback and volume with hand motions. Adjust volume by waving to the right or left; skip tracks with a flip of the wrist.
Convenience
- Li-ion battery: Recharges faster, lasts longer.
- 2.4 GHz wireless: An operating range of 30 feet lets you navigate media from anywhere in the room.
The Logitech MX Air mouse demo by the Logitech product manager shows how it works.
$150 is quite expensive considering that you can accomplish pretty much the same with a Wiimote and the GlovePIE software. It may not be as accurate but it works well as you can see in this Windows Wiimote demo.