If levitation were a DLC, I'd pay nothing for it, unless it were just one new spell added in an expansion that includes lots of other features. I don't care if it's the most awsome spell ever designed, ONE spell in a game is not worth forking out real life money for, neither is one suit of armor for that matter. If it's in the game, that's nice, if it's not, that's kind of dissappointing, but I'm not paying any amount of real life money just to be able to use levitation.
The answer, though, was pretty clearly a joke, it either means we're not seeing levitation in the game, or they're not ready to say one way or another. But right now, it doesn't look promising for levitation, and not putting it in the game but releasing it as DLC would diminish my respect in Bethesda, because it's pretty clear at this point that people want levitation, so if Bethesda still feels it doesn't need to be in Skyrim, they should stand by that decision, releasing a DLC for it will just make it look like they intentionally left it out so they could charge for it later, and I do not want to see a developer I like turn to that kind of method to make money.
Also in Oblivion there was nothing to levitate to because, while designing Oblivion, they must've had in mind that there wouldn't be levitate. When designing Morrowind, they knew the players would have the ability to levitate (and the spell"Jump") so they designed the game to have places only reachable using those spells. That's why They probably still wouldn't be trying to see if it could "fit" into the game, they would of designed the game to "fit" the ability to levitate (hopefully, at least)
Quite true, Morrowind could easily have been designed not to need levitation if it was not included, I'd imagine that the decision to include levitation was made first, and then Bethesda designed the game world under the assumption that players would have that spell and would use it. Oblivion could have been designed to benefit from levitation too, if it were included, but since it wasn't, Bethesda could of course design the entire game with no levitation in mind.