I dunno, man. I think fuel economy is about to start mattering a lot more, which is likely to be disruptive to the "shove the sausage through the sky" paradigm of air travel. Picture a scenario in which Airbus brings this to First Flight and then the EU announces they'll be taxing emissions on passenger aircraft because global warming. Protectionist? Debatable. Effective? If it becomes say $30 a ticket cheaper to fly an Airbus into de Gaulle because it's shaped like a boomerang, there's gonna be a lot of boomerangs at de Gaulle. Especially if COMAC, Mitsubishi and Bombardier can pull it off but Boeing can't.