I see Mr. Mica's point. Just because someone builds an airplane (including Boeing) doesn't mean that the US taxpayers should have to foot the bill for specialized improvements to accomodate it.
As far as the introduction of the 747 went, world airport authorities were falling over themselves trying to entice the traffic that the 747 brought.
Personally I don't give a hoot if a A380 ever touches down on a US runway. Same goes for the 747-800. If FEDEX wants to land a 380 in Memphis, they can pay for the airport improvements for it.
That should be one factor that airplane manufacturers should consider when designing new aircraft . . . i.e. what airports can handle it without gross special expenditures. Just because the French build a new airplane doesn't mean I'm obligated to put my tax money into making a place for it to land.