first of all, its unlikely to reduce the crowded skies. Just add to them.
Secondly Jay, the US isnt considered the main market for the A380, be it for customers or destinations. So far how many US carriers have actually ordered it? so far i can only name a cargo company that being Fed-Ex, Memphis runways are ready for it and since the super hub there is seperate from the rest of the airport, its done. I know a few others are almost ready aswell. But most other airlines, are thinking asia and australia routes right now. london singapore, london sydney. and so on all those airports and their respective taxpayers have to pay out for it too
Some other news on the plane, Virgin have deffered their order till late 2008 and many other customers are thinking of doing the same.