That's it. Everything else is fodder for academic debate, which has nothing to do with actual writers telling stories.
And yes, I agree that the Dune books are a lovely mix of Science Fiction and Fantasy. Such fine books. Too bad they're being spoiled by those wretched pre-Dune novels, which now outnumber the originals, if I recall correctly.
I can't say that the Dune books inspired me to write. More they inspired me to give up all such hopes. How could I ever hope to compete in a field that had these treasures in them? The trick though, at least for me, was in not trying to write like Frank Herbert. I can see his influence all over in Matt's writing though -- at least when he's really on his game.
Above and to the left you can see that my new Fables prose novel, Peter and Max, is getting some nice, front-of-store, placement. This pic was taken by Chris Ryall (he who wields mucho power at IDW publishers) while on a trip to Seattle.