As I understand it, it's not that PPC won't be supported, just that it won't be supported until they've got the OS in what they feel is a fully useable state (though from what I've seen I'd say it's already there.) They did have PPC builds, and there's at least one developer still working on it, it's just not a focus of development and not officially supported ATM.
I certainly hope they support it, I'd love to be able to install it on my Powerbook.