My only guess on this is max capacity. Theoretically if the tube were large enough you could run a few of these a day and carry thousands of people on each one.

My only guess on this is max capacity. Theoretically if the tube were large enough you could run a few of these a day and carry thousands of people on each one. If you can get the energy consumed per passenger way down, then costs may decrease and a ticket could be much less expensive. If you could travel hundreds of miles in a half hour, you might make a lot more trips. Changing the cost structure and timing dramatically would change the way people think about long distance travel from something you do once in a while to being as common as going across town for an afternoon. Obviously this is all far-fetched given today's technology, but I'm just letting myself daydream.