A hologram expert and professor of theoretical physics at Dalhousie sets the record straight on the hologram-like images used in CNN’s election coverage in this CBC article:
The CNN anchors were not really speaking to three-dimensional projected images, but rather empty space, Kreuzer said. The images were simply added to what viewers saw on their screens at home, in much the same way computer-generated special effects are added to movies.
Kreuzer said the images were tomograms, which are images that are captured from all sides, reconstructed by computers, then displayed on screen.
Holograms, on the other hand, are projected into space.
Will.I.Am was unavailable for comment.