For "smart", read "snoop". It is now advertised as a feature that a "smart TV" watches you. Sky expects customers to pay extra to be able to use the video themselves.

If I could pay extra to make sure nobody could watch me through it, that wouldn't convince me to tolerate that device in my house. (After all, it runs nonfree software and talks to the internet.) But it would eliminate one of my objections to it.