The short answer is health and safety, both of which are priceless. We’d give anything for a bit more of either one, and future smart watches will offer plenty of both. I’ll briefly summarize each below.
In the first generation Apple Watch, we have heart rate and daily steps monitoring. Future devices, from Apple or Google, will likely add blood pressure, skin temperature, in short, we’ll be better able to monitor our bodies.
Many of us can image being in a scenario where we might need quick access to a phone, say a car or skiing accident, or perhaps after slip and fall, for example. Futures watches will keep our lifeline to help on our wrist. Your slow or irregular heart could be a signal for your watch to automatically dial for help, transmitting your location.
In summary, you might not be wearing an Apple Watch but you will be wearing someone’s smart watch.