Movies don't, in fact, deal well with fantasy. Of course, they can transport us to a fantasy world like Star Wars , but once we are there, that world becomes real . We can count the buttons on an actor's shirt. In a sense, the world on the screen seems more real than life itself. A good film story idea recognizes and makes use of this sense of immediate reality.
Stage plays are also dreams.
For the most part, however, stage plays take place in one location and deal best with those themes that do not require physical action to carry the plot. While both stage and film dramas deal with conflict, stage characters usually talk their way through the dilemma on their way to self-discovery, but film characters must take action against other characters. Generally, movies don't ask us to imagine what a character is thinking or feeling, but show us their results of those thoughts and feelings in actions that we can see clearly. The best movie ideas do this by structuring events in ever increasing importance. We don't want to watch the character make the same decision or go through the same actions over and over again.