This is really cool. I have an ICM (Medtronic LINQ) for something I don't believe an iWatch could detect so this isn't an option for me, but I do know they are sometimes used for AF as well, and mine cost over $60,000 to implant (billed to insurance, though my part was still much more than an iWatch costs). I have to think doing the same with an iWatch massively increases the pool of people who are capable of affording continuous monitoring.