The Art of the Title Sequence interviews director Jim Capobianco and animator Alex Woo about the thoughtful end credit sequence of WALL·E. From the article intro:

Jim Capobianco’s end credits to Andrew Stanton’s “WALL·E” are essential; they are the actual ending of the film, a perfect and fantastically optimistic conclusion to a grand, if imperfect idea. Humanity’s past and future evolution viewed through unspooling schools of art. Frame after frame sinks in as you smile self-consciously. It isn’t supposed to be this good but there it is. This is art in its own right. Peter Gabriel and Thomas Newman’s song, “Down to Earth” indulges you with some incredibly thoughtful lyrics and, from the Stone Age to the Impressionists to the wonderful 8-bit pixel sprites, you are in the midst of something special