Having come up in the era where movies are only movies if they're released in the theater... I don't know if that holds true anymore. I've been involved in some movies that have gone 'direct-to-video,' and that used to not be a good thing, but now it's different.
But novels are never about what they are about; that is, there is always deeper, or more general, significance. The author may not be aware of this till she is pretty far along with it.