The electrification of the home was enabled by cheap DC motors, heating elements and so on, and the current wave of ‘smart home’ devices is enabled by cheap and low power cameras, wifi chips, microphones and so on (mostly coming out of the smartphone supply chain).
Meanwhile, these machine learning components are also themselves components for smart home (ML makes the connected camera or the smart thermostat useful) and vice versa (a smart speaker is often just an end-point for a voice assistant).
I tend to think about this in terms of Venn Diagrams - it would be good to use voice to tell the oven to preheat to 350 degrees, and it would be good if the smart door lock can talk to the burglar alarm without my having to say anything, but the door lock doesn’t need to connect to the oven.
The battery optimisation uses ML, and Google’s night mode uses ML, but those are clearly completely different pieces of code and the user never needs to hear ‘AI’ when they use this.