Another, even more impressive version of the technology is under development by a new company called Senseg. Their approach utilizes the Coulomb force, better known as the static electricity that causes a balloon to stick to your hair when you rub it. Manipulating the electrostatic forces between the touchscreen and your skin, Senseg can induce sensations of different surfaces, but the technology also actually enables the user to push a virtual marble around the screen and make it feel like a real object.
"Alright, that's enough rocks. Bring on the taint page."
Think of the applications of this technology. For one thing, forget about people who still insist on slide-out keyboards for their phones -- this could mimic the feel of plastic buttons under your fingers. People who have lost their sight could operate their iPads without a problem -- all they'd have to do is switch the language to Braille. Virtual cats and dogs could be petted just like real ones. And let's not even discuss the hordes of inevitable iBoobs apps, because otherwise we'll be here all night.