Her hair still looks dumb.

True 3D realtime holography is not only possible – it makes use of a Kinect as its input device. A team at MIT has recreated the famous 3D Princess Leia scene from the original Star Wars – but as a live video feed! via A Kinect Princess Leia hologram in realtime. Related articles

A Kinect Princess Leia Hologram In Realtime (hardware.slashdot.org)