Always skeptical: The real test for Europe is whether there will be further economic integration. Many warned at the beginning of the Euro experiment that you can't have a monetary union without a fiscal one. Canada, which is a federation, could be a good model (or not). Transfer payments between regions have been accepted here for a very long time. In Europe, from what I've witnessed it is Germany especially, that resists such a system. Until that integration happens I'm afraid I don't believe you'll see a post national state on that continent.