I read about new engine technology for the 7E7, but technically, what is the revolution?
Regarding the 7E7, it will feature a new generation of engine technology (no bleed air), as well as a wing and fuselage made primarily of composite material. It will have interchangable engines, a first. The 7E7-300/800/900 allow an airline to take commonality to a whole new level. The Base model is predicted to have a range of 8500nm, or roughly 98% of what an A345 is capable of. All for a sweet aquistion cost of 100 mil, undercutting the A330 by approx. 30 million USD.
The "Revolution" is that airlines now have a single basic airframe that can fly short haul, medium haul, long haul, and ultra-long haul routes economically. Its small size means it can break even with lower numbers of passengers than an A330 or 777, possibly opening up many new Trans-pac non-stops.It also means low risk, something on the mind of many many airlines right now.
The 7E7's Entry-Of-Service is set for 2008, a time when many early 757 and 767, as well as older A300, A310, will be reaching the end of their useful life. The 7E7-900 will probably compete directly with the A330, while the 7E7-800 will be sized close to a 763.
The A380 features extensive use of GLARE a fiberglass/aluminum alloy as well as laser welding. I'm not really an A380 follower, so this is about all I can say.
[Edited 2004-05-04 00:42:50]