Apple's haptic touch feedback concept uses actuators, senses force on iPhone, iPad
In an effort to make touchscreens less static, Apple has proposed that future iPhones and iPads could feature actuators that would provide haptic feedback to users, and also include sensors that would measure the force at which a user touches the screen.
http://feeds.appleinsider.com/click.phdo?i=845ed75a44197ddf168af7cc779a0468
