Out of ideas

I heard this morning that Shrek is getting turned into a musical. I recognize the business sense of doing so, given how successful other animated-feature-turned-Broadway-shows have been (although I sort of think The Little Mermaid tanked), but really? Have we reached a total saturation point where there is nothing new under the sun? It seems like every play and every movie is based on something else, or is a sequel, or a spin-off.

Not that I've had any brilliant ideas for a book or a show or a movie, but it'd be sort of nice if someone did.