I have already seen an early dev video that showcases a Bofors being controlled by human and shooting at AI planes.
Btw, did you see the lonely bofors in the vid that just sat there and did nothing?
1) Perhaps that's the clue, you can now control AA?
Either way it's a cool feature they've long talked about and to be frank, it would be awesome to have ingame.
2) What would really be awesome was if they upped the view-distance LODS on ships so you could control ships and wage naval warfare
3) Pilot walk outside aircraft (view damage after a fight for instance, or able to get in/out of aircraft and pilot them. This is a logical possibility since they already allow players to "swap" aircrafts mid-game with no delay whatsoever)
4) Final guess would be implementation of a bailout sequence