Elon Musk proposes city-to-city travel by rocket, right here on Earth

mmh, interesting, but maybe Musk should see further to a way to travel (uncomfortably) for leisure. The idea can be designed with more important objectives in mind.

Maybe like a sort of eyectable-seat ships for people working in (and living around) nuclear power plants, or small islands under the influence of an active vulcano, or a way to evacuate almost inmediately in case of a missile attack. You can be more prone to forgive some discomfort or even pain if the other alternative is worse.

LOL, so this basically puts airline industry, healthcare industry and insurance industry etc,. out of business if successful.

And then sell them to any country willing to buy. The bring-your-own-warhead approach.