The points you make are economic in nature. Supersonic flight is just too uneconomical to really be worth it at this point in time---regular jet service is "go

The points you make are economic in nature. Supersonic flight is just too uneconomical to really be worth it at this point in time---regular jet service is "good enough" (just a side note---some thirty miles west of Miami a two-mile long runway was built for supersonic flights; it's now used for training. You can see it here: http://maps.google.com/?ie=UTF8&ll=25.861695,-80.871048&spn=0.28515,0.392075&t=h&z=12 http://maps.google.com/?ie=UTF8&ll=25.861695,-80.871048&...) A friend of mine, an architect, says that it's technically feasible to build a skyscraper a mile high (not to say it wouldn't be technically challenging; just that it is possible). But they aren't not because it's not worth the money to build (hard to rend out the office/hotel/living space where there aren't windows). And for phone quality, mobility and convenience of use has trumped quality for most people, so again, it's economic in nature.