Just went to see "Happy Feet" yesterday.
I must confess I was blown away by this movie!
True: I had very little expectations about the whole thing... The idea of realistic penguins dancing and singing all over a film that is not a musical seemed pretty awkward.
Penguins tap-dancing and singing tunes from the 80s and 90s... strange.
However the film surprised me. The animations (and motion capture) were very well done - it's hard to get some emotion from penguins, but they did a great job there.
But what really got me "wow" was the rendering: texture and lighting... The environments are amazingly real. The details in each shot are so many!...
I recommend to everyone. It's a must see!