Better than better than good. It is, however, not recommended for children. WALL-E is to film as Moses and Aaron is to opera, albeit cast with two robots and a bunch of figures from a Botero painting. The first week gross will be high but I fear that next week some bold genius at Pixar will be fired.
Addendum: Here’s one financial analysis of the movie’s prospects. And note that movies with no dialogue in the first half hour are not ideal for DVD sales to children.