I feel like nfid would be a good use case for this. Scan your NFID sticker when you arrive home which triggers a workflow to disable indoor cameras, and the reverse when you scan to leave.
Sad, the nest protect has a microphone, multiple networks, speaker, light, presence detection, alarm, smoke detector, etc.
I'd love to get the same hardware with a sane stack that will interoperate with my home not just today, but in 10 years as well.