Apple’s new Health Sensing System for Apple Watch Ultra 4 means more accurate and more frequent health metric tracking. It feels like the peak offering of a device before a necessary complete redesign.

Apple Watch Ultra 4 review: Better health features & AI
Nearly every improvement made to Apple Watch Ultra 4 relates to health, fitness, and the ability to track those metrics. Even the longer battery life was pitched as a way to track metrics over a longer period of time.
Tim Cook may have stepped down as CEO before Apple Watch Ultra 4 was revealed, but it and the Apple Watch Series 12 are clear realizations of his vision. Apple Watch is a health-focused wearable that aims to improve the wearer’s life, and perhaps even save them in emergency situations.