We will see
However I've always thought that the 'sonic cruiser' idea was clutching at staws; a non starter from the beginning.
A mach 1 aeroplane offers an advantage, but is it enough? .14 mach increase over it's subsonic competitors, not much is it.
If Boeing could come up with a real SST that could carry many pax over long distances they would have a winner. Trouble is that they cannot, and nor can the opposition.
Thing is the diabolic French have come up with an idea that will eclipse the 747.
As an aside, having flown both Boeings and the Bus can Airbus please find it within themslves to recruit some of the people who designed the flight control software for the 777
Regards
Exeng