If Cook is to be believed and these days I trust him more than the background noise of MR, Apple is just warming up. He says health will be the biggest segment they enter and the most meaningful thing they ever do. That's a huge untapped addressable market that plays very well with the ecosystem they already have.
There is a reason why biotech, pharmacy, and the health industry milks money in the US. People will pay a lot to live. Of course Apple will want in on the pie, especially with the publicity the AWs are getting.