Anyone who cares at all about their privacy wouldn't have a roku TV to start with. Roku is one of the most invasive companies there is. Their devices take multiple screenshots of whatever is on your screen every second and then uploads those images to their servers to be scrutinized so that they can make assumptions about you as a person. If you have a Roku TV they can do that for any non-roku device you're using too…
> Their devices take multiple screenshots of whatever is on your screen every second and then uploads those images to their servers to be scrutinized so that they can make assumptions about you as a person. Source? Also, do they do it only on Roku TVs, or even Roku devices like their sticks?
https://www.consumerreports.org/electronics/privacy/how-to-t...
The TV makers don't need ACR when you are using apps on their OS. Those apps all report the currently playing title to the OS maker. ACR is used for when you watch broadcast TV or anything coming in over HDMI.
The margins on TVs are surprisingly small, so being able to show you a few dollars of ads every year dramatically improves that margin, which allows the TV to be either a better value or cheaper compared to other sets you see in the store.