WALL-E is another in a sequence of great films from Pixar. What is great about Pixar films, besides the obvious, is the way they include great detail in each film. For WALL-E, there are a number of things, obvious and otherwise, that can be found in the film, as noted in this article from slashfilm.com: WALL-E Easter Eggs
One thing this article doesn’t point out is the references to “2001: A Space Odyssey” by Kubrick. I spotted at least two: the references to HAL and the part with the apes. There’s likely more.
For folks like me with kids who will watch these things over and over again :), all these details are appreciated.