I don't agree with you, I am serious about fitness and have both a Garmin and Apple watch 2, I love the apple watch and wear it running my easy days, its brilliant to have music on the run, the apple watch 2 in my opinion is a product I would miss if I didn't have it anymore as I find I use it a lot throughout the day for setting timers, messages etc..just like smart phones - "smart" watches will hit a saturation point.
it's unfortunately not a product that is necessary perhaps more of a distraction.
That said if you're serious about fitness you go to garmin.
if you're a casual walker/runner then there is everything else.
Garmin are good for track workouts etc, but sometimes when Im on a recovery day they drop my vO2 max estimate cause im tired, this is where the apple watch comes in great.