but being about the Genius being consumed by Alzheimer's, it's not quite typical, is it?

No. You could change the film so Iris isn't a writer but, say, "just" a professor herself, and it wouldn't change the story. Which one could say is another problem by itself, but then to be fair, as I said earlier, it's very difficult to get the genius of writers on screen if you don't film their work.

Sister, Shakespeare's, to make another Woolf reference.

Quite.*g*