Have you ever seen a great twist in a TV episode, only to see it shamelessly copied in a movie? Looking back on some of the old anthology series, I've noticed that many of the twists and bizzare concepts of newer films were already covered by the twilight zone and others of its kind:
Are You Afraid of the Dark: Tale of the Dream Girl The Sixth Sense
Tales from the Darkside: The Moth The Skeleton Key
Monsters: Pillow Talk Death Bed
Twilight Zone: The Living Doll Child's Play
Granted, this is only a few examples, but I'd be willing to bet there are others.
Actually....the Living Doll movie had been done in the old antholgy British film from 1945...DEAD OF NIGHT! A CLASSIC!!! HIGHLY RECOMMENDE!