Dune in its full glory is simply unfilmable. Between the exposition that can be naturally woven into a novel that simply can not be naturally woven into a movie and the amount of the book that takes place as character's thoughts, to even the little things like the chapter headings being used for flavor text from a future encyclopedia, there's just no way to capture the whole thing on film.

I haven't seen the movie yet, but I liked the sci-fi miniseries well enough. (As I've said before on HN, watch it as a very well-produced theater production and not a somewhat poorly-funded movie and it's really quite good.) So I'm not saying it's impossible to film something Dune and for it to at least be good. But it'll never be able to stand in for the novels.

I would be amused to see some series get far enough to try to film Chapterhouse Dune, though, which in my opinion is even more complicated than the original Dune in the ways that would matter for a film. Books 2 and 3 would be generally simpler, you can tell they didn't get as much love. God Emperor of Dune I believe holds up better than 2 & 3, but it is still narratively simpler than the original Dune. The final truncated trilogy is quite complex, though.