I'm not so sure that countries will be all that enthused to follow China's example. Aside from the technical and infrastructure costs, it's evident that they're using a huge amount of human manpower. A lot of countries don't have the knowhow or billions to do it.

At this point, I suspect the lesson will be to block all sites except those that force people to use their real names, and arrest them if they say something unapproved. Intimidation is pretty cheap.