You tend to look at the biggest pictures and long timelines and you always give good insight there. I like to look a few steps ahead so I can imagine more precisely how it might play out. In the next decade or two I don't see nation states disappearing but instead the subcultures of the future will be those who will claim citizenship of non-nations such as bitcoin, hive, facebook, or even LGBTQ.
Slowly the infrastructure will adapt to cater towards this and perhaps in 20-30 years nation states will just be more like voluntary local clubs to join. It might be a clusterfuck of confusion until then though, but we will be building. I imagine a slow break down but people will look back and say the story started in 2008-2009.