A 3-D Holographic Display
ZonkerWilliam sends along a link to a Wired writeup on a novel 3-D holographic display developed at USC. Be sure to watch the video at the bottom of the page. "The process is not simple but can be defined through a few key concepts: Spinning mirrors, high-speed DLP Projections, and very precise math that figures out the correct axial perspective needed for a 360-degree image (even taking into account a viewer's positioning.)"
Seems not new to me, but the idea of it in greyscale might be useful in medical applications if you could take a 3d Image, and manipulate it, however, seems gimicky to me. We do pretty well w/ two monitors and a pair of butter knives.
How much is your data worth? Back it up now.
If it projects an image over a solid object (that can crush your hand if you touch it, btw), it's definitely NOT holographic.