It's quite comical, really.
I mean, constitutionally, it doesn't matter whose arse is on the throne as long as the institution of the Crown remains. The Monarch is really a human rubber stamp and could as easily be elected as not. Vikings, Anglo-Saxons and Celts all have traditions of elective monarchies as well as inherited ones. The only change the Normans made was to remove the requirement for the sucession to be approved by the nobles, and that didn't always work out.
For another thing, if Prince George does come to the throne, he'll be the first King of England since 1066 to have a drop of English blood in him!