Series of TV shows are common because the audience likes the convenience of tuning in every week at the same time and because they can easily do so since the TV set is in their house and has no usage fees. Seeing the same characters week after week leads to extensive character development during a season. Movies are about stories . Viewers have gone to the trouble of driving to the movie theater, so they want more than a half-hour show, though most films are still less than two hours long due to human biology. Because of the lack of series, characters are developed less and the film rests more on a strong plot.
Theater is about ideas .
The audience sits far away from the stage and cannot see the actors as well as on film. Nor can the stage show as elaborate sets or landscapes. These differences lead to prominence of dialogue over visuals. Also, the added expense of live actors for every performance makes the tickets significantly more expensive than movie tickets and attracts a more elite and intellectual audience. At the same time, the start-up cost of putting on the performance is less than the cost of producing a film, meaning that theater is more suited for experimental expressions.