The intro to WALL-E combines an image of a post-apocalyptic Earth with the post-war vocals of "Hello Dolly." It connects the post-apocalypse to the aesthetics of the 50s ("Hello Dolly" is actually from the 60s, but still), the period both of the birth of consumer society and of nuclear paranoia, an image reinforced by the subsequent 50s stylings of the Buy 'n' Large outlets we see a bit later. I'm intrigued as to why this is the style we still reach to, 60 or so years later, when we want to represent the end of the world.