With the limited land on the airport site, I wonder if the Dart could be used as a catalyst to bring more people up to the terminal, and not just train users and in the long run this new facility developed further?
Back in the 80/90's there was talk of a terminal being located where the current Parkway Station and passengers would then be transported to what is now the Central Area, after clearing security and this whole area on the hill would be considered "air-side".
I think those plans may have been a little pie in the sky, but I wonder if things like moving the drop off zone and bus station away from CTA could be a possibility in the years to come. This would free up a huge area of land to extend the terminal and aircraft parking.
I guess it all depends on passenger perception and if being dropped off and then getting a train to the terminal would be acceptable.