It was a marvelous, powerful and visionary speech that shook the world. One can see it's effectiveness by noticing the reaction of enemies of freedom.
The Syrians, The Iranians, Ted Kennedy...that's everyone ;)
But seriously, it was his best SOTU to date, especially because he called up the Mullahs' number. The fact that the Ba'athists, Islamic Fundamentalists, and anti-American socialists are all united against it means it was effective and pointed. It will be remembered for a long while.