Massive Open Online Psychology.
You wire your house with iPhones or Alexas recording your daily conversations with your family - it records things like "number of positive responses" vs "number negative responses" when replying to your spouse or children.
There are dozens of simple verbal checks one can pull out of even fairly raw speech to text, let alone visual dances.
And imagine if you had a monthly review with a therapist how had all this data at their fingertips- and could coach you and your spouse to improve the worst of it.