Nothing high-lights a good screen and machine like a CGI movie, seems to me.
I am not re-buying very many movies in blu-ray, but I'm making exceptions for all of Pixar's movies. Hokey Mama, they are beautiful. I just started on Cars. It was never my favorite, but pretty good, and even if it wasn't, the sheer beauty of the visuals in HD... OMG.
(I'm also waiting for Over The Hedge to come on blu-ray, that one was wow.)