The Looking Glass displays are powered by our proprietary light field technology that generates 45 distinct views of a three-dimensional scene. Unlike any 3D display that has come before it, multiple users now have the ability to gather around a Looking Glass to see different parts of that scene in the real world, without any eye-tracking or headsets.

On a 2D display, every pixel shines with a given intensity and color. But through the Looking Glass, the light also has directionality to it. The optics splits the otherwise normal 2D display into 45 different perspective. Which means, as you move left and right, each eye is grabbing the image from a different point of view and the light reflections, change realistically with your movement.

As you move around the Looking Glass, your eyes are exposed to different sets of 3D information, creating a life-like 3D experience for the viewer...

When you peer into a Looking Glass, you will see 3D content that feels like it’s physically there. The sensation of physical presence is a result of our proprietary light field display technology that renders scenes in a truly three-dimensional way. The holographic image can be seen well within the 50° view cone coming out of the display — no headsets required.

(Via LookingGlassFactory)

Besides the different descriptions of 3D displays like the telestereo (1928) or the 3D tank display (1934), this use of the looking glass 3d display might remind fans of science fiction and fantasy writer Roger Zelazny of Jelerak's transport mirror in his 1981 novel The Changing Land. A certain sorcerer, Baran of Blackwold, had set a cislunar elemental a task; explore and figure out the mechanism of the magic mirror:

Baran of Blackwold paced within the small chamber. Several old volumes lay opened on the table beside the wall.All the paraphernalia for conjuring lay spread upon the floor, and he found his way without glancing down as he walked.
A tall mirror with a grayish cast to its glass hung within an elaborately wrought iron frame, chased about with figures both animal and human, engaged in acts of a mainly violent nature. An elongated orange form swam within the depths of the mirror, as a fish in a shaded pool. It was not a reflection of anything within the room. The paraphernalia had already been used.
"I charge thee, speak." Baran said in a low voice. "You have had ample opportunity to explore the mechanism of the mirror's operation. Tell me of it."
A musical, almost cheerful voice chimed in the vicinity of the glass.
"It is very intricate."
"I already knew that."
"I mean to say that I see how it functions, but I do not understand how the effect were wrought. The spells involved are incredibly subtle."
The figure seemed to be swimming toward the surface. It grew. It turned. Its body was obscured by its shining, elongated head, which rushed forward until it filled the entire glass - triangular-eyed, gilt-scaled, small-mouthed, above a tiny pointed chin, below a broad forehead, its three small horns thrusting forward from amid a soft and stirring mane of feathers or flame.
"Release me now," it requested. It is a doorway to other places, from other places. There is no more I can tell you..."
"Return to the depths and do as I have bidden you!"
The face spun away, dwindled, diminished, became a darting thing within the mirror...