Watchworthiness Notification

  Here's one: in exchange for a small extra fee paid to your cable provider, they would notify you whenever a sports event is close and worth watching.
  For example, nobody ever watches tennis, but wouldn't it be nice to receive a message saying "Turn on channel 17 - there's a 14-14 tie in the final set..." so you could see the epic games without wasting time on the dull ones?