The Apple Watch Series 8 builds on its predecessor with advanced health and safety features. It includes a new temperature sensor for cycle and sleep tracking, and introduces Crash Detection, which can alert emergency services in the event of a severe car accident. The Series 8 retains the bright Always-On Retina display, ECG, Blood Oxygen app, and fast charging. With its durable design, swim-proof rating, and updated watchOS features, it offers a balanced blend of wellness, safety, and convenience.