I believe that if you have a network stack and can download files from the internet--which would include software--that it counts. I don't want to re-read to find the part, but they seemed to imply that any system where you could download software from the internet and then run it.
> “Covered application store” means a publicly available internet website, software application, online service, or platform that distributes and facilitates the download of applications from third-party developers to users of a computer, a mobile device, or any other general purpose computing that can access a covered application store or can download an application.
To whittle down the the important part:
> “Covered application store” means
> any [...] general purpose computing that can access a covered application store or can download an application
If you have a network stack, you can 100% connect to a "covered application store" and thus the OS falls under the scope of the law.