The Apple Watch Ultra 4 is slated for release next month, launching alongside the iPhone 18 Pro and iPhone Ultra. Three rumored features are generating significant excitement.

First, a more powerful S11 chip is expected, optimized for enhanced Siri AI capabilities. This upgrade, noted by Bloomberg's Mark Gurman, addresses the stagnant processing performance since the S9 chip in 2023, promising a faster and more responsive Siri experience on watchOS 27.

Second, the Ultra 4 anticipates substantial health sensor upgrades. Reports suggest a doubling of sensor components and significant improvements to sensing functions. With a new high blood pressure notification feature reportedly under FDA review, enhancements to existing health tracking are highly anticipated.

Finally, improved power efficiency is expected, likely leading to better battery life. While not guaranteed to extend usage time, this upgrade is crucial for the Apple Watch to compete with fitness bands like WHOOP and Fitbit, potentially allowing for longer use, especially with more demanding Siri AI features.