The victory represented only a major battle; the war continues.
A note for the casual reader, it is now believed that the iconoclasts were primarily motivated by an attempt to appease the Islamics at the gate as the Moslems reviled Christian icons. The more things change...
And yet -- a good many muslims are going to the movies to see the Passion of Christ, iconophobia notwithstanding, and coming away deeply moved. That cannot be a bad thing.