Of course you can browse and compute on any surface but its much more than that. Any accessible information you could find on your computer is available. If you need the time then draw a watch on your hand. Want to snap a photo without your camera, then use a simple gesture. Watch live footage of the news on the newspaper. It reads and understands any surface in front of it. It will show your bank balance on your credit card. Able to read your airplane ticket and tell you if your flight has been delayed. Etc.Etc.
I should also mention any I-phone application is usable.
‘SixthSense’ frees information from its confines by seamlessly integrating it with reality, and thus making the entire world your computer"