What I liked best of all were the renditions of familiar comic-book scenarios - such as a base on a tropical island - in a more realist style. Obviously it's an animation, but the richness of the art work is way beyond anything you would ever get in a printed comic. In particular the quality of the light, in scene after scene, especially twilight. It's beautiful.
If they have to make a Watchmen film, this is definitely how they should do it (IMHO). Take the same content, the visual exposition, and just render it to a higher level. And you could have the comic-within-the comic as a different kind of animated film, within the pixar-style animated film.