They look awesome! He seems even more powerful than he did before. Before he was more calm and collected, yet held a powerful bearing presence, much like his appearance in Diablo II. Now he is just outright powerful.
This is what they used to look like:
Its good to see evidence of Blizzard working hard on Diablo III, even though we already trust that they are.
Thanks to lordbone and Shisou for the heads up.