Plausibly valuable, or even inevitable someday. But would require much greater adoption of home-automation, and a few more-compelling must-have benefits, to see

Plausibly valuable, or even inevitable someday. But would require much greater adoption of home-automation, and a few more-compelling must-have benefits, to seem a good business. Considering your example, are there any automatable bathtubs yet? Or is making such a thing part of your idea? (The cost of retrofitting such installed plumbing, and the electrocution liability, suggest to me it'd be a long, slow quest.)