I don't see the need for them regardless, as the their tech improves so will tech all areas. How much business travel is that require such service? Cannot many

I don't see the need for them regardless, as the their tech improves so will tech all areas. How much business travel is that require such service? Cannot many transactions be done via teleconferencing? Even product demos, physical interactivity requirements and such will be solved for remote customers long before hypersonic passenger planes. Then comes down to the other point, who does most of the traveling anyway? Those with the money and the time to do so. Hence why I would scoff as much at the LA to SF bullet trains as at hypersonic passenger planes. Neither will be cheap enough for the average person to just hop on and the average person probably doesn't have all that free time not already assigned out to use them. Getting somewhere faster is meaningless when you don't have the time to be there. As for the terrorism angle, until you remove the ability to pilot the vehicle on board it always a possibility, more hollywood than fact though