I hate to sound like a Luddite but it seems I'm not the only person to think that the watch didn't really need reinventing. It seems lots of people agree, but it hasn't stopped Apple shipping 1m of them per month. Apple's market cap has doubled since the death of Steve Jobs.
Apple markets its Watch as a time-saving device which can be used to order an Uber, pay for an item, or check a flight time without using your phone, but it would seem that the majority of owners use it to check the time and notifications rather than using apps.
http://uk.businessinsider.com/apple-watch-usage-statistics-2015-11