In a scene straight out of Star Wars, researchers at Osaka University in Japan have demonstrated a working 3D Projector that projects onto a column of fog, for full 360-degree 3D viewing.

Researchers at Osaka University in Japan have made a 3D and 360-degree display that projects from a variety of different angles onto a cylindrical fog display. This combination of multiple-point of view projectors and the cylinder allows for a display that is 3D no matter what side you view it from, though in order to get a holodeck style of projection a much larger set of projectors, and a lot more fog, would need to be on hand. In order to project into the one cylinder of fog, it took three projectors

via 3D, 360-degree fog display shown off (w/ video).