There is an absolute gulf in quality and functionality between the Apple Watch and other smart watches. It's not like the smartphone industry at all. Nobody can compete with the Apple Watch and nobody is even vaguely trying.
It's common in the "sports watch" side of things from the likes of Garmin. I'm not sure how well they do for things like the elderly falling though, they're more targeted at bike crashes and the like.
I have the Series Zero, which is now state of the ark, so I'm not really up on what's widespread anymore.