> The main hold-outs will likely be Italy and maybe Spain, although I'm projecting maybe two decades into the future, the politics may have changed by then.
Spain does have a quite extensive e-government system, certainly miles ahead of the UK. The problem is with their implementation, which is as clunky and hideous as you could possibly imagine.
My vote for the laggers would go to France and UK. And my vote for the most pervasive, expensive, and inconvenient system to eventually go live goes to the UK and France.