That could be. I also read it where he just discovered the Prime app on their ATV box, and now don’t have to use their cable box anymore. It could also mean the Apple TV plus service, along with Prime.
As for Prime, I don’t think it is enough to replace cable tv (if that was what the comment was about). There are some good stuff on Prime, but I found other streaming services much better in regard to content. I also don’t like the interface of the prime app. The latest update is much better.