The movie, at 115 minutes, is the longest all-CG film to date. The plot actually fills the time out nicely — I never felt bored, rushed, waiting for the next scene, or wondering why we hadn’t seen more of the goings-on. It wouldn’t be nearly as good a film in either traditional animation, nor in live-action. In the CG realm, the amazing powers of these supers look both incredible and natural. With live actors, they will always look like special effects unless done really well, really subtly, or with the suspension of belief firmly in place before you get anywhere near them.
Dave, from Dave Does The Blog, writes a wonderful review of the movie with some interesting links I hadn’t noticed before.