The Lockheed F-35 Joint Strike Fighter program has produced many advanced technologies . . . but I think none are stranger-looking than this.
It's the so-called Helmet Mounted Display System (HMDS) being developed for F-35 pilots. The developers claim (with a straight face):
The HMDS provides a range of information symbology, including off axis targeting and cueing, day/night infra-red imagery, and flight information, directly onto the inside of the helmet visor. In addition, the HMDS incorporates a virtual head up display (HUD), which enables information currently restricted to forward line of sight in a cockpit panel mounted system, to be viewed wherever the pilot is looking; the F35 will in fact be the first tactical fighter jet to fly without a conventional HUD in the cockpit.
Others describe it somewhat differently. In an article titled "Die Laughing" Aviation Week correspondent Douglas Barrie points out:
Advanced helmet mounted sighting systems may offer a great deal, including possibly saving your life in a dogfight, but they can make the wearer look like an extra from Plan Nine From Outer Space. Either that or it’s the love-child of a relationship between a Dalek and a Cyberman, for anybody who’s ever seen the British cult science-fiction show Dr. Who.
Or, alternatively, it may remind you of the need for caution when operating teleportation machines in an environment containing common household pests.