Ok I'll play along with those that think they know what is up Boeing sleeves.
The article below in .pdf format list some interest facts or claims as some of you will state.
1- The 450-passenger 747
Advanced will beat A380 trip
costs by a vast 19 percent margin,
and still offer lower seat
costs. Using existing airport infrastructure
and ground support
equipment, the 747 Advanced
will enable airlines to serve a
wide variety of markets.
2- Quietest jumbo jet of them all, the
747 Advanced meets the most
stringent noise requirements.The
747 Advanced is the very image
of fuel efficiency and low emissions.
Consuming 14 percent less
fuel per passenger than the A380,
the 747 Advanced is the most
environmentally friendly highcapacity,
Ok how is Boeing going to accomplish these claims as presented to the airlines if things are the same old 747-400?