I see where you are going, but no, just give me the raw text and without DRM and I am happy. It is the story that counts and good books don't need gimmics. If there are illustrations (animated or not) relevant to the story, good. You can even add advertisements if that would make ebooks cheaper as far as I am concerned.
But showing distracting animations because you change page, no thanks: changing page has nothing to do with the story in book.
This said, I can imagine mixed media books, but that would demand very different book readers than those we have today. I am sure there are plenty of mixed media artists with stories to tell. But this is a different kind of "book" (if that is the word).