Regular 3D displays must be getting a little too commonplace in Japan or something
(they're even popping up in cellphones), because now
researchers there are showing off a technology called the SeeLinder that takes things up a notch and let's you make 3D
holographic video calls. SeeLinder uses a 360-degree digital camera and cyliderical tube to create real-time
three-dimensional holograms that'll let you view the person you're talking to from almost any angle (i.e. you can walk
around them and stare at the back of their head while they're talking, etc.). Most 3D displays have a sweet spot that
only gives you the full effect when you're looking at the screen from a specific angle.