Roku’s software is increasingly integrated into TV sets as the built-in smart TV stack, making Roku’s software the one to manage the HDMI connections and display of everything.
Sony has been going with Android TV, LG has been with their WebOS, and Samsung with their Tizen.
Given that the top 3 largest TV manufacturers don’t have a single TV model with built-in Roku, I wouldn’t be worried.
However, I still heavily prefer just sticking an Apple TV to whichever TV I have, connecting the smart TV to my wifi, blocking all internet access to it (all while it is connected to my home network), and go along my day without having to worry about any of their built-in “smart” features.