During an interview with Wired, Cook highlighted the Apple Watch’s AFib and sleep apnea detection, while also hinting at the possibility of using AI to alert users to serious illnesses:

I’m not going to announce anything today. But we have research going on. We’re pouring all of ourselves in here, and we work on things that are years in the making. We were working on hearing a long time before we got it dialed in to where we felt comfortable shipping it.