Well one of the things taht couldcome of a runway expansion is that the new super cruiseships could be based here and this could bea huge boost to the city. In addition we could handle more direct regional flights.
While perhaps not above lowering taxes on business it is up there in my opinion. Its the old plumbing problem you can have the largest tap in the world but you are not going to increase water flow without making the pipes bigger.
The Cruise ships will only visit here, they will never begin a cruise from here because its too hard for passengers to travel to get here. They need a hub city such as Seattle or Vancouver, nice thought though.