https://techcrunch.com/2017/09/12/the-apple-watch-series-3-will-transform-a-lot-of-workouts/

Apple’s played it a bit cautiously for the last few Apple Watch upgrades — like many others, the company no doubt understands the limitation of the smartwatch form factors. They’re small, so it’s hard to push things too far. The company also doesn’t have much in the way of competition when it comes to market share — the Apple Watch is the rare bright spot in the smartwatch market.

On the face of it, so to speak, the Watch Series 3 maintains that trend. Beyond red accenting on the crown and an ever so slightly thick heart rate monitor, the product is virtually indistinguishable from its predecessor. As ever, the big changes are inside. First, there’s the markedly more robust processor that brings new functionality like Siri’s voice baked directly into the device.