Airships as player housing I kind of doubt, but I do fully expect the Scions to get an airship as a mobile base at some point in the future. Personally I'd hope they got the Prima Vista, or failing that the giant airship from Dun Scathe.

In fact the huge airship docked at Camp Cloudtop is basically the same thing and is a completely unfulfilled plot hook, I could easily see Ishgard gifting it to the Scions as a thanks for everything, especially since it's heavily armed and armored but they never managed to get it flying on it's own. Cid can get it done for them.