Can you name one aircraft on the drawing board in the 150 to 170 seat range that will be available in the next 10 years that is more fuel efficient then the 737-800? Boeing themselves just said they don't have the technology to build a jet with the 20% increase in efficiency they say they need to launch a new aircraft and have put off a replacement until at least 2018 and more likely the early 20's. Airbus has made the same choice.