Half a decade has passed since Android Wear debuted. During that time, we've seen in-screen fingerprint readers, rollable TVs, self-driving cars, super-smart AI, phones with folding screens and more. In the midst of all that technological advancement, Android Wear has remained relatively unchanged. In its five years, Google's OS has grown smarter and more useful and has even undergone a serious makeover. But the system, now known as Wear OS, still doesn't feel fully matured.