Well, considering that the boat ride doesn't seem to be completed, and that there is no use currently for the airship, I can't see them rushing to put it in.

I'd love to have them too.

The boat ride is missing many reference textures so that you actually feel like you're moving; it doesn't have any sort of dynamic to it like FFXI, although it doesn't have to. It would also be very nice to be able to walk onto the boat yourself, rather than getting picked up This actually bugs me a lot.

The airship would need to have air to fly though, and they would need a mapping of the ground below to incorporate it. This also includes reference points.

I really don't expect to have airships until they redo all of the world.