OK, I've got a ton of other stuff to write up but this is the second time I've had to smack CNN during this election. THIS IS NOT A HOLOGRAM:
It's a (pretty crappy looking) two-dimensional (hence NOT a HOLOGRAM) green-screen camera trick. It's not all that much more than an updated version of what we were doing in 1985 at Associates and Ferren with an automated, motion-controlled film camera:
Wolf was not seeing anyone in the studio in 3D. THAT would be a hologram. As it says right on Wikipedia, "While holography is commonly used to display static 3-D pictures, it is not yet possible to generate arbitrary scenes by a holographic volumetric display." There is NO technology currently that could project a 3-D image in free space at that scale, regardless of what they showed in Star Wars (which was a MOVIE).
This just popped up in Digg from the CBC and features an interview from a physicist.