People
Good heavens, television is something you appear on, you don't watch.
— Noel Coward
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
A snobbish quip that flips the usual habit. Watching television is treated as what ordinary people do, while the proper place for someone of standing is on the screen itself. The mock horror of "good heavens" sharpens the joke about vanity.
Context reviewed