September's Apple event is anticipated to unveil new Apple Watch models alongside the latest iPhones. Expect updates to the Apple Watch Ultra 4 and Apple Watch Series 12, featuring a "long-awaited bump in chips and speed" according to Mark Gurman. This upgrade is timely with watchOS 27 introducing Siri AI. While one report suggests a "major redesign" for the Ultra 4, Gurman believes significant design changes are slated for next year. However, a ceramic case option might return for this year's models.

The Apple Watch Ultra 4 is also rumored to receive a "significant upgrade to sensing functions," potentially doubling the number of sensors. This could tie into enhancements for hypertension notifications, building on last year's feature. The FDA is reportedly reviewing a new high blood pressure notification feature, likely to debut with the Ultra 4 and Series 12. While new chips, minor design tweaks, and health features are expected, specific details will be confirmed at the launch event.