Alimaui,
I think you are on the right track, but just to throw my 2 cents in: I don't think increasing private jet travel will increase ATC congestion much, especially at airline hubs. The whole idea of a personal jet is that you don't have to travel to or from the major airline hubs. Additionally, airline hubs are generally only busy in spurts, due to hub and spoke operations. Private jets, due to their irregular schedules would, in my opinion, serve to decentralize air travel and reduce ATC congestion. Throw in "free flight", or point to point travel and the system should become much more efficient (soon hopefully)!!