6. Economists call this a collective action problem. Traditional solutions include legislation, market leadership, and agreements among small actors to achieve such leadership.
You left out: The "killer-app."Compelling content *only* available via the alternative technology. The IPv-ONLY google/porn/web/tube/iphone/whatever that enough people want/desire/need/are-willing-to-pay-for to move the network to IPv6.
--chuck
