The Cyborgization of healthy people.
What if your wristwatch could tell you that you were about to have a heart attack?
You’d be able to chew some aspirin to prevent it. You’d be able to call 911 and get the ambulance on the way. You’d be more likely to survive.
Predicting next generation Apple products is always fun and often wrong. Never the less this concept fits with the “tricorder” trend toward digital diagnostics that use inexpensive devices like a cell phone to improve health and reduce costs.