Of course, the unmentioned elephant in the room here is that Apple watches don't work with Android phones (it's possible to use the "cellular" version with limited features without a phone, but you still need an iPhone to configure it), which means that ~70% of the market are up for grabs...
But the ~70% isn't in every region, it's an average over all regions.
Certain developed countries, Apple iPhone market share is 55%-65% (Norway, USA, Canada, Japan), UK is at 50% and starts dropping down in other Western European countries. South Korea is dominated by Samsung.
Sure, I didn't say Garmin had no competitors, just that the Apple Watch is limited to 30% of the smartphone market, while Garmin can address (a part of) the remaining 70% plus some of Apple's 30% as well.
