Very interesting little piece on the BBC tech site relating the advances in holographic technology.
The two little pieces of video show how far the researchers have come so far. There are still major limitations to it but at the speed technology is moving ahead at the minute it may not be too long before we can all watch Star Wars and get really excited when R2-D2 plays the scene with Princess Leia does her holographic Thang!
Though it still requires a projection screen and is still very far from holographic projection into free space, this is still an exciting development.
I expect this to be Lucas' next big development in cinematography once he gets bored with 3D.