Kev and DGX, I take your points that your states are not quite like the states in Australia. There's quite a bit of a difference there. So there's more of an argument for differentiation of Law between the states in US.

I just think of all of those social rights and freedoms which I think we would all support, aside from abortion and some types of gay marriage...those right were enshrined federally in similar method to Roe & Wade. I really can't think of any other practical way that this could have been done? And now ,technically, they can be undone in the same way as R& W. I'm not saying that would happen, but it opens the door.