What we’re expecting
Ultra 4 is expected to add a new blood-pressure feature, still under FDA review.
Apple Watch Ultra 4 is reportedly getting a high blood pressure notification feature, and Apple's already submitted it to the FDA for review, so this isn't vaporware, it's a product waiting on a regulatory green light. Blood pressure is one of the most common unmanaged health risks in the US, and a wrist-based alert system would put that detection on tens of millions of people who'd never otherwise think to check. No public release date yet; the FDA moves on its own schedule.
Does Apple Watch Ultra 4 offer blood pressure monitoring vs others?
Apple Watch Ultra 4Rumored (strongest candidate)
Samsung Galaxy Watch 9Yes (where approved)
Apple Watch Series 11Hypertension alerts only
Samsung Galaxy Watch 8Yes (where approved)
Apple Watch Ultra 3Hypertension alerts only
Apple Watch Series 12Rumored
Galaxy Watch Ultra 2Yes + possible full readings
Pixel Watch 5 (upcoming)No (not confirmed)
Galaxy Watch Ultra (current)Yes (where approved)
Pixel Watch 4No