Body animation has never exactly been Bethesda's strong suit, but I am pleasantly surprised with the body movement in Skyrim.
Typically Bethesda games have had pretty bad animations. Walking in Morrowind looked like you were a wooden man trying to strutt, while Fallout 3 characters didnt 'run' so much as glide majestically across the ground. Although some stuff like the falling giant in the demo looked a little off, the actual animation for characters (ie, running, walking etc) all do look like the best Bethesda has done. They're much more fluid than in the other games, so it looks like Bethesda has worked hard to improve that niggling problem with their games.