didn't watch it yet, but definitely plan to do. i saw some trailers and i hear that around the first half of the movie is completely without dialogue.
wall-e himself looks to me almost, as if he starts to cry every moment. n_n
but seriously, this is kind of a cute version of a end-time possibility for this planet (like ghost in the shell in a friendly way, but that's off topic).
interesting. can't wait to see it.