I can think of a ton more people who want to go from SF to NY (LA to DC, etc) or vice versa for the day than I can people who want to go to London for the day.

I can think of a ton more people who want to go from SF to NY (LA to DC, etc) or vice versa for the day than I can people who want to go to London for the day. Flying supersonic, you could actually get some work done on the other end. My guess, is that supersonic flight would be a huge boon to California, making it much more practical to locate 2,000 miles away from the geographic concentration of customers.