Yes, but making air units stationable on Forts will give the human another advantage because for example intercontinental invasions will be easier (and goodness knows they're easy enough as it is now) - we can simply send a worker across the ocean in advance of our regular army to build a fort on an unclaimed tile and transfer all our air units over instead of a) taking a city first or b) investing in carriers, then our ground force just has to defend the fort while the air mops up. The AI won't use tactics like this, guaranteed.