And look at how warped that sea turtle is! Was he run over by a steam roller on his way to the ocean?
Actually, this was executed quite nicely (or as nicely as you can with just TV screens). But this has the advantage of putting at least a little bit of distance from the passengers and the screens by having them on the ceiling.
--- Update ---
Whoa. I just had a massive "aha!" moment.
Glasses-free 3D technology exists. It's expensive, but it exists.
Now, stay with me here (there's a point to this). If anyone is familiar with Sony's 3D display for the PS3, it has a mode that allows one person to see one picture, while another person sees something completely different. The swap off is that it's no longer in 3D, but it's still really neat.
But that's using shutter frame 3D glasses. We don't want that.
The concept of glasses-free 3D is the same as those little cards that have pictures that "move" when you look at it from different angles. So theoretically you could take one of these glasses-free 3D screens, program it according to different viewing angles, and OMG I AM A GENIUS! The only drawback would be the lack of 3D, but, in a sense, it would be achieving the same effect they use at the end of Harry Potter and the Forbidden Journey with the great hall scene BUT IN REAL TIME.
I have absolutely no faith that Universal is clever enough to figure this out and or pull it off, but I can rest easy knowing that it's possible.
--- Update ---
And on a final note, what do you guys think the chance is for The Knight Bus having a home somewhere near Diagon Alley? Even if it was just a photo op I'd love that.