Tiny roombas that can dust my house and reach into areas on my carpet that big roombas cant. Roombas that can clean my ceiling in hard to reach places. Roombas that can go up to my lights, signal to them to turn off, and replace the individual LEDs in a modularized light assembly.

Tiny roombas to help find the pen you just sat down, turned your head, turned back, and the pen is gone. You know it went somewhere, but you're not quite sure where; it might not even be in the room anymore.

Tiny roombas to clean your bathroom, or unclog pipes, or micro-repair infrastructure like houses and roads. Tiny roombas to help to agriculture work, or terraform Mars.

Giant roombas to terraform Mars, the size of houses.

sigh.

I was thinking about entering the bank when a tiny roomba with a dead battery crashed on the pavement in front of me, leaving a crater of rubble and plastic.