Board Thread:Skyrim/@comment-124.182.212.163-20140321222851/@comment-4057437-20140412085926

Leveled enemies usually means that the type of enemy changes, such as facing draugr deathlords instead of less powerful draugr. This varies from dungeon to dungeon; some dungeons do not get more difficult while others do.

As for a level cap, a basic draugr will still be a basic draugr, with a relatively low level, no matter what the Dragonborn's level.