"Unfilmable" just means impossible to translate into a sequence of scenes, with characters and a coherent story. For example, long internal monologues about the

"Unfilmable" just means impossible to translate into a sequence of scenes, with characters and a coherent story. For example, long internal monologues about the design of space ships, etc. You could try, but it wouldn't be entertaining in a classical sense without deviating strongly from the source material. Animated shows would have the same problem.