Have you heard of Sixth Sense , No i don’t mean the movie , I mean the actual sixth sense . Wikipedia defines it as

Extrasensory perception (ESP) involves reception of information not gained through the recognized senses and not inferred from experience.

Or in short you can sense or do stuff you normally can’t. Now here is a guy which is working on exactly the same thing . His name is Pranav Mistry and here is his project

SixthSense, a wearable device that enables new interactions between the real world and the world of data. As you will see in these videos he can paint , make calls , grab pictures , sort them , read messages , check prices on amazon , see youtube on newspaper and a load of stuff just by using his fingers (that too without touching anything) . I have to say this technology is pretty amazing

The best part is It will be open source and currently the prototype costs just $350 bucks. So i am assuming if this comes out as a product in near future it won’t be costly (well i do hope it comes out soon)

Now you have to check out these videos as they are plain awesome

There are many other videos and pictures on the project page so do check them as well