Imagine this: You just got home from work and, instead of doing the usual kale salad and lean steak for dinner, you grab a bag of chips and lie down in bed.
The sensors — in your cabinets, in your room, on your wrist — can tell that you're not yourself. The data across devices can talk to each other and infer: You're sad. And so, out pops an alert to recommend a movie to lift your mood. Or a latte at just the right strength.