Being an actor in TV or movies is different. A film or TV actor, if put in theatre, won't know certain dimensions, while a theatre actor won't know certain things when he comes before the camera. So I think a film actor can learn emoting from this theatre counterpart, while the theatre actor can learn about camera techniques from the film actor.
Whenever I don't have anything to do, I play Candy Crush or Scrabble. We actors have time between shots, which we need to kill. And we cannot call friends or family, as you are called at a moment's notice. So you need to do something which you can dispose of immediately when called for a shot.