Earlier quoted context omitted.
> If I'm in an App and search, I expect my search to be localized to that App. If you're using a fullscreen app on macOS and activate spotlight, do you expect it to only search that app, or do you expect it to behave like Spotlight always behaves and search the entire system? Put another way, this depends entirely on how the OS and UI is set up.
On Roku if you search in an App it is localized. If you search on the home screen it is not. I expect voice search to behave similarly.
Regardless of what you think is a better user experience, Roku has made a design decision and are sticking to it and aren't giving Google special treatment, so Google is threatening to take their ball and leave if they don't get what they want.