Back from holiday so have now installed the new iPhone, Watch and AppleTV beta updates, and may have found a killer feature in the WatchOS update which allows the Watch to connect to my bike Bluetooth Cadence sensor, so effectively making the cycle computer redundant as the Apple Health cycle mode will replicate all the functions the cycle computer will do. Interesting to see how this might impact battery life though on the watch given it will be much more active during rides.
Seems to be lots of little changes to iPhone in terms of widgets and messaging integration, but probably more updates for the Instagram generation rather than myself. Early days yet so will probably find more useful features as I delve and others update so the SharePlay functions come into their own.