Trixie was defeated. The Amulet of the Alicorn and its deadly curse was taken away and hidden where nopony would ever find it in their unfortunate hooves again...
But Trixie will find that such a magical artifact's power doesn't depart from one so easily as that.
She will learn the true power of the Alicorn's Curse, as well as the pain that it brings.
Maybe somepony else will too.