Future Apple handhelds could potentially offer feedback when touched, a Toshiba technology demonstration hints. At this week's Embedded Systems Expo in Tokyo, the company is showing off an iPod touch with a special film on top. Based on a Finnish technology known as "Senseg E-Sense," the film helps to generate small electrical field changes that can nevertheless be felt by human fingers. Resistance can be simulated when sliding open a door, for instance, and buttons can be made to feel as if they protrude.
