I agree with the statement that books can be more immersive, because it's up to you to create that mental picture of what's happening, but I also agree with the fact that a book sometimes isn't the best way to casually enjoy a story, there's no discounting movies from books, or plays from literature because really they're just different mediums for us to experience something.
I think they complement each other, sometimes anyway, because we all know what horrors movies can make of a book *cough battlefield earth cough*