There's a few people missing the point here.
The case is not about photography; its about the publication of photos in the press and the consequent financial implications that has.
The case was not brought by a celebrity. JK Rowling was not the claimant. The case was brought by her son.
The decision is not a final judgment. The defendant sought to have the case struck out as being one with no realistic chance of success. The Court of Appeal have refused to strike it out. They take the view that the claimant's case is, at least arguable. That does not mean the claimant will win at trial. (Although, the chances of it going to trial are probably pretty slim now)
The full judgment is here: http://SPAM/4uoecs
Obviously, you can all go and read it for yourselves and decide what it means, but one paragraph from the judgment seems to me to be the crux of it:
"It seems to us that, subject to the facts of the particular case, the law should indeed protect children from intrusive media attention, at any rate to the extent of holding that a child has a reasonable expectation that he or she will not be targeted in order to obtain photographs in a public place for publication which the person who took or procured the taking of the photographs knew would be objected to on behalf of the child. That is the context in which the photographs of David were taken."
MV