I don't understand all these comments talking about how these prototypes are inferior to existing transportation technologies. You're comparing something completely new, that's barely started the transition from thought to physical reality, with technology that's half a century old.

The Wright Flyer was slower than a contemporary ship, let alone a train, yet this technology quickly became the fastest transportation available.

Hyperloop is supposed to average about 600MPH and hit a top speed of 760MPH. Now, that's a far-off estimate of something totally unproven and could be way off, but if you're going to compare it to alternatives you need to compare what it will become, not what it currently is. You might disagree on what it could become (I have no idea how much of the supposed specs are feasible and how much is just wishful thinking, and it wouldn't surprise me at all if it couldn't achieve its goals) but you can't just look at some first-try barely-works prototype and assume that's the end state.