Comeback for Supersonic Air travel?

Developers are pitching US airlines financial options for helping pay for the development of a new “supersonic” passenger plane that will cut flying time from London to New York to 3.5 hours and LA to Sydney in half to less than 8 hours. The new aircraft, offering around 65 seats, will fly at 1,300 mph — no estimates on development costs or travel fares. Hold on!!!