Great as a way of cracking the government monopoly of information in China. Not so great as a potential tool for terrorists to coordinate their attacks.
allows Internet users to conceal messages inside photos posted on the Web, bypassing most known police monitoring methods Terrorists already use this kind of stuff, firewall or not.
What this would do though is give our intel people yet another mass volume of stuff to work with, hence the need to hire a whole lot more people, or figure out a way to decipher the stuff en-masse