I would not call movies as fake. Movies are perform once, and watch over and over again by many many people. Theatre is watched only by the live audience, unless it is videotaped.

Movies give you a much much bigger canvas. You can shoot at different locales, but in theatre you are retricted to the stage.

The advantage of theatre is the possibility of a live discussion by the actors with the audience, after the show, which unfortunately very few theatre companies do. Hence theatre is an excellent medium for controversial topics.

Another advanage of theatre is low-cost of production, but with today’s digital cameras, movie production costs have dropped drastically.

I sometimes want to go to the theatre to be surprised. Movies, because of their ease of availabilty, can have too much hype around them, which could bias me towards the movie even before I see it.

And theatre gives voice to the small budget man, who not necessarily has small ideas to present.

Because of live actors, theatre is expected to be more cohesive. Movies are shot over days or weeks or years, and directors like Woody Allen do not even give the script to the actors. They just ask the actor to say a dialogue in a happy/sad/angry/etc. tone. So if the director/editor screw up, the actors won’t even know about it till it is too late. Also, because of interspersed shooting schedules, in movie, it could be very difficult to get the exact emotion out of the actors, specially if the actor is working on multiple movies at a time. Hence usually, good actors come out of the theatre. Also, many famous actors return to theatre just to do some “real” acting.