Things Edge Impulse customers have in production: Sleep stage prediction, fall detection for elderly, fire detection in power lines, voice command recognition on headsets, predicting heath exhaustion for first responders, pet feeders that recognize animals, activity trackers for pets, and many more.

Turns out there's not much you can train when like 5 parameters fit into the entire memory of a microcontroller. Oh and you also need to read the sensors and run a networking stack and... yeah.