Pranav Mistry is the master of technology when it comes to interfacing physical world to Digital world.
He is the innovator of Sixsense, a wearable device which provide awesome physical Interaction to Computing world.
Here is the video of his presentation at TED India.
http://www.ted.com/talks/pranav_mistry_the_thrilling_potential_of_sixthsense_technology.html
Kamlesh Parmar Blog on Engineering, spirituality,Business 