Apple Watch Ultra 4 rumors: design tweaks, smarter health, and a microLED reality check

The Apple Watch Ultra 4 is already drawing interest from runners, divers, hikers, and anyone who pushed the Ultra 3 to its limits. After the Ultra 3 added FDA‑cleared hypertension notifications and a new Sleep Score, the path forward is clear: deliver smarter health insights, squeeze out more battery life, and refine the design while preserving the features that make the Ultra line the default “go anywhere” Apple Watch.