Now I’m thinking of an Alan Parsons Project tune.
If it was small enough and had a reasonable battery life, I’d be curious about a Collar Cam for pets or…y’know…robotic dogs with flamethrowers. If the pet was an outdoor cat that wanted to hang around, say, a Wyze Bird Feeder, then even better! 
I’ve thought for a while (but haven’t yet taken the time to write my notes into a single Wishlist topic) that what I’d really like to see is a robot vacuum with a tilt camera (the robot itself can do the panning) where the camera is on the order of something like an OBSBOT Tiny size. If the vacuum is already using lidar to map and negotiate its environment, then the addition of a camera would provide even better information (assuming that on-board AI could integrate it), plus it could double as a sentry and be especially handy if it could be directed via voice commands to Google Assistant. Give the whole package the ability to navigate and clean stairs, and I’m in!