November 19, 2009: PUSHING A USER INTERFACE TO A REMOTE DEVICE
A graphical user interface (“GUI”) 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.
That is the seed for using blank hardware.
Replace “portable media device” with “Cloud Server” and Apple already has it covered.
— via Patently Apple link