Or a personality/political profile could be built on a person from the shows they watch.
Or your social score could be reduced if you watch too many subversive shows. Oh but that's in China, and could never ever happen here, so no worries about building all the infrastructure to enable it. Except if you view terrorist content, then the UK feels justified in jailing you for 10-15 years [3]. But hey I don't think there's precedent yet for using smart TV fingerprinting for that, so why worry?
Lets give up our autonomy and privacy one tiny slice at a time. And when there is nothing left, you can point to each individual slice and explain to us how losing that one was totally insignificant and non-nefarious.
[1] https://en.wikipedia.org/wiki/Digital_video_fingerprinting
[2] https://www.theguardian.com/us-news/2021/sep/16/geofence-war...