The Apple Watch Ultra has basically looked the same for years, and that’s why these Apple Watch Ultra 4 leaks are such a big deal. In this video I break down what supply chain reports (shoutout DigiTimes) are pointing to: a real design overhaul in 2026. We’ve been stuck with that same 49mm chunky, rugged titanium vibe for three generations, but Ultra 4 is rumored to go slimmer and more refined—still “adventurer,” just way less bulky and way less sleeve-snaggy. But the headline leak is Touch ID on a watch. Code found in Apple’s backend suggests biometric authentication testing, likely built into the action button or the Digital Crown. That could make Apple Pay and locking down sensitive health data way more seamless. On top of that, Apple’s pushing harder toward the holy grail: non-invasive health sensors. The rumors point to a redesigned sensor array that goes beyond heart rate—tracking blood pressure trends and potentially early-stage glucose monitoring for pre-diabetics. Add the S11 SiP with a dedicated on-device AI engine, possible MicroLED delays but a likely LTPO OLED jump (up to 4,000 nits), and battery potentially stretching from ~3 days to ~5 days. If this lands in September 2026 with iPhone 18 Pro and iPhone Fold, Ultra 4 could be the first true “must-upgrade” moment for original Ultra owners.