A California company called OStendo Technologies Inc has developed a tiny Tic-Tac sized projector that can project 3D holograms without requiring any 3D glasses.

According to the The Wall Street Journal, the Ostendo Quantum Photonic Imager "fuses an image processor with a wafer containing micro light-emitting diodes, or LEDs, alongside software that helps the unit properly render images."
"Ostendo showed a working prototype: a set of six chips laid together that beamed a 3-D image of green dice spinning in the air. The image and motion appeared consistent, irrespective of the position of the viewer."