Yeh, I don’t think this is really holography. But I do seem to recall reading somewhere that they had made a breakthrough that allowed truely realistic holograms (as in ‘you try to reach for something and are surprised when your hand goes through it’ real). Can"t find a cite though.
Oy! Well, I feel stupid. I heard the word “hologram” and read it a billion times in news articles about the presentation, so I kinda thought … “hologram.” And thus I totally had a geekgasm. (As opposed to the Goregasm I was already having. Love this guy!)
But if it’s just a regular flat projection on a glass screen (is that what you’re saying?) then it’s not as big a deal.
Anyway I think that girl was pure CGI. Her movements, voice and the graphics of her dress – which are more noticeable in the full version of the presentation rather than just that brief clip – all seem vaguely artificial and similar to the incredible CGI animation they do nowadays. An amazing simulation, though.
Then again apparently my ability to judge technology ain’t so hot, so wtf do I know!
They’ve been around for a while; I’ve seen a few. The catch is just that they’re difficult to make, and thus expensive.
The real difficulty isn’t making the holograms realistic; it’s animating them. You could put a few different frames into the same holographic plate, keyed to different illumination directions, and switch lights on and off at the various angles to switch frames, but with current technology, you couldn’t have more than a handful of frames. And there’s no technology currently available that will let you generate a hologram on the fly: You have to create your hologram with the subject in a studio, develop it, and ship a piece of glass to whereever you wanted to display it.
Another important point to note is that you’ll only see a hologram if your line of sight terminates on the glass plate. You can make a hologram where the image projects out in front of the plate, but if you look at that plate edge-on, you won’t see the image protruding out. For this reason, it’s easier to make a hologram look convincing if the image is entirely behind the plate, producing a window-like effect.
For decades, we’ve been seeing a (fake) depiction in tv shows and movies of holograms that exist in empty space, without the viewer’s line of vision having to intersect any kind of plate or projection medium. Are we any closer to actually achieving that? I can’t think of how that would work in the real world.