3D displays - display device capable of conveying depth perception to the viewer 

Holography - a technique which enables three-dimensional images to be made 

Screenless display -  systems for transmitting visual information from a video source without the use of a screen.

EyeTap - a device that is worn in front of the eye that acts as a camera to record the scene available to the eye as well as a display to superimpose a computer-generated imagery on the original scene available to the eye. Picture: EyeTap inventor Steve Mann wearing a metal frame Laser EyeTap. 

Google glass
Head-up display - a display device, worn on the head or as part of a helmet, that has a small display optic in front of one (monocular HMD) or each eye (binocular HMD). Picture: a man controls Google Glass, a type of Optical head-mounted display, using the touchpad built into the side of the device.

Google glass2
Google glass - wearable computer with an optical head-mounted display (OHMD) that is being developed byGoogle in the Project Glass research and development project,[8] with a mission of producing a mass-market ubiquitous computer.

Augmented reality
Augmented reality - a live, direct or indirect, view of a physical, real-world environment whose elements are augmented (or supplemented) by computer-generated sensory input.  Artificial information about the environment and its objects can be overlaid on the real world.

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