Barring the availability of commercial point-point sub-orbital travel ( which comes with its own set of noise and technical problems ). There is considerable c

Barring the availability of commercial point-point sub-orbital travel ( which comes with its own set of noise and technical problems ). There is considerable casual interest in shorter flight times. The three main challenges for this have always been fuel consumption, wear and tear on the aircraft, and noise issues while overflying cities/towns. If the noise issue is solved you could meet private, and high-end commercial flight demands. Where the customer isn't concerned with an order of magnitude increase in flight costs. If you can make a big dent in the former using new materials, improved aerodynamics, or higher altitude flight then there is an opportunity to chase commercial customers.