A patent filing made public today stems directly from the Apple purchase of biometric company AuthenTec, and could lead to future iPhones and iPads using part or all of the touchscreen to act a Touch ID sensor.
Source: APPLE INSIDER

Aggregating the Future
A patent filing made public today stems directly from the Apple purchase of biometric company AuthenTec, and could lead to future iPhones and iPads using part or all of the touchscreen to act a Touch ID sensor.
Source: APPLE INSIDER