What are your devices? If you have Apple only, Books already does everything you need, and you need no self-hosting.

AI has been impacting the smart home industry at least since AI-powered face recognition in surveillance cameras. I think another interesting field of application is sentiment analysis, i.e. based on how you feel to automatically adjust room climate, lighting, etc. to “lighten the mood”. Otherwise, the AI inside both vac and mop bots can only improve, I feel they are unimpressive right now.