Flying in the old world isn't the only thing getting an updated in Patch 10.2.5. In early Dragonflight Alpha we datamined updated Horde and Alliance assets, and the new transport ships have started to be implemented in game in Patch 10.2.5.
The previously datamined assets had many speculating that we could see a complete old world revamp, and that unfortunately wasn't announced at BlizzCon. Blizzard is likely opting for local zone updates rather than entire continents in future expansions as the narrative allows.
Many of the previous assets did receive additional polish in 10.2 and now with implementation some aspects of the old world are receiving a fresh coat of paint. Right now it appears that only the Human transport ship has been implemented, but we expect additional updates in the future.
Below is a comparison video of the new and old transport ship models. Which is your favorite that you can't wait to travel on in-game?