Sameer Samat, president of Android ecosystem at Google, asked a TechRadar journalist why they were using an Apple Watch, iPhone, and MacBook:
I asked because we’re going to be combining Chrome OS and Android into a single platform, and I am very interested in how people are using their laptops these days and what they’re getting done.


Also, it will be a license nightmare. As far as I know, Chrome OS is proprietary and actual Android has proper open source license.
It’s only proprietary in much the same way as Android. That’s why there are forks like FydeOS.