Out of interest TDracer why do Boeing keep kicking the 737 can down the road? Why not build a new aeroplane or resurrect the 757? It seems ridiculous to have a 200+ seats on a 737 airframe.
Obviously cost of construction and design is one easy answer as to why, but what else? Why haven't they just come out with a clean sheet narrow body design? The risk they run is that Embraer or Bombardier might come and eat their lunch in the narrow body market with a product that represents a 21st century design.