Jetpacks. Flying cars. Hotels on the moon. Dinner in pill form. The reality of life in the early 21st Century is crushingly different to the optimistic predictions of the 1950s. But the idea of mind-blowing hyper-fast travel is something that could actually happen.
I wonder how many other inventors would dare to follow Musk's lead. I guess as space travel is such a small and specialised market, it's a risk which Musk can take, though ultimately extremely lucrative.