I thought the point of hyperloop isn't just that the low pressure tube (not vacuum, but much lower then sea level air pressure) is more efficient but but that you can exceed the speed of sound. Also the tubes wouldn't be a vacuum the entire length but would be reduced in front of oncoming trains.
It should work, the physics are real and for long distance travel over land it has far more potential than air for supersonic speeds. The engineering just needs to catch up with the theory
Unless teleportation suddenly becomes real I think this is a tech that will come, one day, it's just a matter of time for the propulsion and materials technology to be readily available.