Diagnostic aide for pre-vet symptoms Check by owner.

Stress level detector from breathing or behaviour against a trained model.

Video/audio informed petcam for feeding station management: More exercise more food but sedentary less food

Robotic toy, playstation for pet. Feedback for a visual stimulation or moving light toy

Better Saltwater tank management (emulating seasons and tides)

Facial recognition for pet entry and exit

CatGPT: Feed me. Pet me. Can I sit on your head?

Absolutely

I haven't seen any product for that, it would be very interesting to see one.