Well, it looked prety good in the pictures, but it was pretty well hopeless other than from a "getting attention aay from the A380" point of view. A combination of hopes that have never been managed before, fly at .95 + economically , go further than anything else of the same size and do it with materials that have not yet been fully developed ! optimism in the extreme one would say !
The ned is prety predictable, but it might just have caused a stumble by Airbus on the A380, so give Boeing credit for that. However, the high speed 747 is only a tarted up 747, a little bit faster before severe drag rise sets in, but one suspects no less of a fuel burner than the current ones at current speeds, or they would offer the stick on bits as retrofit wouldn't they ? Doubt that you would get any kind of economic cruise out of a 747 at .95, not to be confused with MMO, which could be up near that number. Someone probably knows what margins you need between the Mmo and Vd.
Looked good, but who in this time wants to see seat mile cost go up !
bye
Martin A