A “Series 4” due this fall is rumored to be getting a bigger display, a new form factor, and battery and health sensor improvements. There’s still plenty of room for improvement on top of that.
Week-long battery life
Although the Series 3 can potentially last up to two days with light use, let’s face it —charging is usually a nightly ritual for Watch owners. That’s why there’s a multitude of docks and other third-party charging options, often designed for nightstands.