Writers who write about writers writing

I think the word is solipcism - the idea that the self is all that can be known to exist.  But I am not necessarily critical of writers who write about writers who are writing.  I have some hints of self-reference in things I write.  And its also interesting, because the experience of creating a story and the world of that story is actually a very interesting phenomenon.

Here are some examples in films:

1. Barton Fink
2. Adaptation
3. Synechdoche, New York
4. Stranger than Fiction
5. Inkheart