Unfortunately, the Broomba doesn't clean up after you like a Roomba might, but it does travel autonomously around the room cackling and playing scary music.
Is AI Moving Too Fast? | Future Tech
As menacing as that sounds, this evil can be stopped in it's tracks by carpet, stairs and / or a gentle push. It can also be humiliated by children attempting to play Quidditch. [Grandinroad via TGH via OhGizmo via Likecool]