96 pico-projectors used to create a small 3D holographic display
Researchers from the Japanese National Institute of Information and Communications Technology (NICT) have created a new 3D hologram table that can be viewed from 120-degrees (although the researchers say that they can take this to 360-degrees). They have used convex mirrors and an impressive range of 96 (!) pico-projectors (they are using 3M's old MPro-110 projectors) in order to create this.
The images themselves are low resolution, and only 5 centimeters high.