Thanks for posting that, I found it intriguing and ended up watching the entire video. Amazing to think this was back in 1975!

What an excellent presentation. I don't have much of a physics background, but this was immediately understandable.

I think that's the idea for the boosters that would appear at even intervals in the Hyperloop track. It would be infeasible to build the whole track as one huge linear motor, which is why Musk's paper suggests an air cushion instead.