Yes, I know, you've seen this. Trend Hunter featured the laser keyboard about 9 months ago. But now, you can buy it at Think Geek for $189! They describe, "This tiny device laser-projects a keyboard on any flat surface... you can then type away accompanied by simulated key click sounds. It really is true future magic at its best."
Implications - The miniature device can laser project a functional keyboard on any flat surface and it’ll even replicate typing sounds. So in other words, if you’re feeling adventurous, you can type on the wall if you want to. The virtual keyboard connects to any Bluetooth-integrated device including PDAs, smartphones and computers. It also has rechargeable batteries that have 120 minutes of continuous typing’s worth of energy.