A lot of my love of literature comes from Oz and Alice.
One of the rules of plays, I feel, is to never use an extra word if you don't have to.
I tend more towards what some people call literary science fiction, but what I mean by that is that it is full of interesting language, experimentation, and ideas.
I do think that theater is a great venue for science fiction, and not just adaptations but also original work. I also think some of the greatest classics of theater have elements of SF, but in theater, as in publishing, sometimes people make arbitrary distinctions.