I am wondering how much of the new "stuff" like the ring challenges, auto exercise detection, fall detection, etc, is actually part of the new watch, and only available on the new watch, and how much is in WatchOS5. I can see the hardware stuff, ie. the ECG, that's not going to be available, but a lot of the other stuff, like the breathe face, and emergency contact stuff should be available. What "new" exercises are available? It only says Yoga and Hiking. Anyone know?