Given that it's a rather big thing I suppose I should write something about it.
Basically, I don't really care. Yes I see it's historical but I also see it as a very clever ploy. Rudd started to do rather badly, I guess that's because he was elected as "Not potentially Peter Costello" and then we learned that he was pretty much a git. I think many people could see that Labor would lose and that the next PM would be Tony Abbott.
Now Labor has a better chance of winning, and if that happens we would see our first elected female PM. Personally I think this change has made Labor more appealing to people who turned away from Labor because they didn't like Rudd.
I think we're just going to have to wait and see what happens.