This sounds like end-of-history talk. In 500 years, the world will not look like now + sci-fi tech. There may not even be money in 500 years.

It's also strange that getting places in 3 hours rather than 2-3 days is the radical change you predict. If people can get anywhere quickly and cheaply, the posited ultrarich would have to spend an awful lot on security, which will bring up their travel times/costs.