Reddit:

His watch called 911 last night after he fell and was unresponsive to the prompts. He has balance issues and we specifically got the watch for this feature after a few incidents prior. He had to get multiple stitches on his forehead but the scans came back negative for internal head bleeding. The doctors said he suffered a concussion and it might take a while to recover from the blunt trauma. I’m extremely thankful for that feature and I don’t know what would’ve happened if we wasn’t wearing his watch.

The Apple Watch saves lives. There are waves of stories about Siri access during emergencies, ECG heart warnings, and fall detection.

To me, Apple Watch has evolved into one of the most significant products Apple has ever released. And I believe the current sensors are just the tip of the iceberg. Apple Watch still has plenty of room to grow.