Apple still has not revealed their smart watch or smart TV. There is no guarantee that Apple will produce anything better, if at all. Apple is no longer the leader that it once was. It can't even decide on a bigger screen iPhone.
Roku consoles are still the market leader here. Many brands have adopted the Roku interface in their smart TVs. Apple TV is good only when you buy a lot of media from iTunes. But then Android share is way higher than that of IOS.