Yesterdays ruling doesn't really change anything with regards to virtual porn. From what I've read, they affirmed the parts of the law that deal with showing clear intent to obtain or share CP, while reiterating the legality of pornography that does not involve real minors. They made a point of saying that it is still legal in that way.
However, it all depends on what the local prosecutors want to pursue. Obscenity is the major threat authors face, not any crimes relating to CP. Objectionable subject matter may make juries less compassionate, though.