Nokia has filed a new patent for a dual-screen touch device. Note that the main display is not a touchscreen; it is simply a traditional display without touch-sensing capabilities.
Nokia believes that touchscreens are prone to damage from frequent friction and contact with sharp objects, which can make them harder to recognize over time. To address this issue, they have designed a new type of touch keyboard. Most operations are displayed on the touchscreen in the keyboard area, and when necessary, the content from the upper window can extend to the lower screen, making it more convenient to use.
It is currently unclear which product this patent will be deployed in, but Symbian has already begun supporting the relevant touch technologies.