I certainly hope to see it brought back... Here is what the GI magazine says verbatim:
Dragons are real and regular threats in the game world. They fly into battle at unexpected times. They ravage towns. They wield awesome power. And you'll have to face them repeatedly in single combat.
So nothing explicit about open cities. Some people might assume that the third sentence implies open cities, but it could also mean that the town rauaging is not random, but triggered by quests, and that the dragons simply appear in the towns once that quest is activated... So it does not necessarily mean that cities will be in the same cell as the game world. Also, even if the cities are in the same cell as the outside world, that does not necessarily mean that Levitation will return. However, open cities are definitely a good sign, as they are pretty much required for Levitation to be feasible.
Also, the mere presence of dragons as a common type of creature in the game may be a good sign. Clearly they will be able to fly around, and that will probably be their primary and perhaps only method of transporting themselves. And if we have to constantly deal with these flying creatures, it seems reasonable to expect a way to fly ourselves... Cue Levitation.