Downfall implies a failure or ending, it seems like they're still selling like hotcakes. This is why we need regulation to save us from surveillance, most consumers want cheap and don't understand/care that they're selling their privacy instead.
Any TV sold in the EU must adhere to the GDPR, so there has to be some sort of opt-out for tracking (and yes, GDPR opt-out also applies for "anonymized" profiling)
This does not stop companies from making it very difficult to stay opted out, or to disregard GDPR entirely. After all, enforcement is very rare.