Some quotes-
* [Technology and the world] only improves if a lot of people work very hard.
* by itself, it [technology] degrades.
* You look at ancient civilizations like ancient Egypt and they were able to make the pyramids and they forgot how to do that. And the Romans, they built these incredible aqueducts, they forgot how to do it.
* If the future doesn't include being out there among the stars and being a multi-planet species, it's incredibly depressing

Elon talked about make tunneling ten times cheaper. The plan is to make tunneling machines over 14 times faster than they are today. This would get tunneling machines up to a snails pace.

Elon Musk explained how the tunnels can hold the Hyperloop.

Elon Musk Reveals First Teaser Image of the Tesla Semi Electric Truck.