‘No Need To Walk Anymore?” Yikes, that sounds ominously like from that echoey song “In The Year 2525.
I think there was a cartoon movie with this theme about three years ago, a little yellow dump truck, all rusty and dirty. I forget the name of the film. Someone here probably knows it.
“WALL-E” was the movie. The humans had gone off-world and gotten so fat, moving about on hoverchairs and having robots do everything for them, that they could barely stand much less walk.