Some users have experienced something similar to this with interfaces like Ford Sync. Controlling an iOS device from an external device, through an external user interface.
The difference in this use would be that your actual iPhone or iPod’s user interface would be beamed over to the device. For instance, imagine a car stereo that allows for direct integration with your iPhone or iPod Touch. Upon connecting, you may have a representation of your device’s screen on your car’s panel with complete control of the device. That’s just an idea, because the patent application describes is as related “generally to accessories for portable media devices.” But because these devices are becoming more common in our cars, it may be safer than having to reach over and grab the phone.
A description of the invention in the patent application follows:
A graphical user interface (‚ÄúGUI‚Äù) can be presented on a remote control accessory device that has user input and display devices. The GUI can be defined and managed by a portable media device that is controlled using the GUI. The portable media device can provide the accessory with a GUI image to be displayed. The accessory can send information to the portable media device indicative of a user operation of an input device in response to the displayed image. The portable media device can process this input to identify the action requested by the user and take the appropriate action, which can include updating the GUI image provided to the accessory.
[Via: Free patents online]