They've already said they plan to launch from floating platforms in the ocean...
Do we have any feasible non-rocket options to do on Earth, though? Air-breathing first stage is all I can think of (but it's essentially still a rocket). Skyhooks and space elevators will have to wait for advances in materials science and will require orbital manufacturing capabilities. Launch loops seem to be too complicated either. Mini launch loops / big guns / other constructs that provide all kinetic energy at ground level won't work because of atmosphere density, and even if you had magic materials that'd survive hypersonic shocks and G forces, it'd still be a ridiculous waste of energy compared to rockets.
At this point I think we don't need anyone surpassing SpaceX, we just need more people copying them. In of itself, it'll drive launch costs further down.
Not yet, no — but a decade ago we didn’t have powered landing and rapid reuse of first stages either. While that observation doesn’t guarantee future tech could (or should) be made, I am an optimist when it comes to tech.
There are a couple of projects along these lines right now, both involving Burt Rutan's Scaled Composites [2,3].
Stratolaunch went through several iterations of spacecraft, at one point I believe it was even going to drop a SpaceX rocket! With Paul Allen's passing not sure what the plans are currently.
[1]: https://en.wikipedia.org/wiki/North_American_X-15 [2]: https://en.wikipedia.org/wiki/Scaled_Composites_White_Knight... [3]: https://en.wikipedia.org/wiki/Scaled_Composites_Stratolaunch
When launching to space you would want to launch to the east to get assistance from the earth rotation. You would want to launch over ocean so any debris/stages don't crash into populated areas. There's not that many places that is suitable.
China has due to geo politics and secrecy three space ports deep inland and it's not unusual that launch stages crash into populated areas. Probably why they've started to launch from ocean platforms.