From U.S. Patent 8,605,008 B1 “Head Mounted Display” filed Dec. 10, 2013:
This invention is directed to a display for video that is mounted to a user’s head. Users of electronic devices may view media on different types of Screens. For example, users may view media on a screen integrated in the electronic device (e.g., view media on the display screen of a personal electronic device, for example the iPod available by Apple Inc. of Cupertino, Calif.). As another example, users may couple the electronic device to a separate display and direct the display to provide the media. For example, users may couple a computer to a screen and display media on the computer screen. As another example, users may direct a television to display media streamed or downloaded from an electronic device (e.g., using an Apple TV available by Apple Inc. of Cupertino, Calif. to display content from a user’s computer on a television).
My take: This seems to be the source of those Apple headset illustrations I’ve been reposting from The Information and Bloomberg News. The whole thing has a funky, steam-punk feel. Note the gears and eye-level magnetic tape drive.