T is negative, but the concept of nation states is obsolete. It will be very apparent in 20-30 years. I'd not invest my wealth in nostalgia.
The world is becoming more interconnected and subject to shocks.
Reputation systems will thus have to become increasingly efficient.
A statist legal system is a monopolistic claim on managing reputation, but its inadequacy will become too costly to maintain.
Competitive solutions for reputation management will arise - the semantic web.
Law by force will be gradually replaced by law by reputations.
If the tacit acceptance of the legal system fades away, so does the power of the state.
In general though, the state will fade from relevance as you say -- but not to the point of 'obsolescence'.