I thought all of those elements were film
elements, and that they were only composited on video. If they were only created on NTSC video, then you're right, they can't simply be recomposited into HD. Send me in the direction of a link or reference book that settles the matter, if you have one. I'm curious to read more on the subject.
I've been falling back on this post as a source, which states, among other points, that the transporter effect was shot on film and just a video composite, as I've been saying.