Apple filed a patent for an all-in-one device that can work as a PDA, an iPod, an iPad, an iPhone or a camera. The figures below show various GUIs corresponding the various applications.

The multi-functional hand-held device has a few physical buttons, keys, or switches so that its display size can be substantially increased. The device incorporates a user-configurable GUI for each of the multiple functions of the devices, including PDA, music player, video player, cell phone, game player, GPS receiver or a remote control.

US20160070399