I see it as a social engagement in Internet connectivity. Today, we depend on rather large infrastructure companies to provide cellular signal. From a social perspective this is not idea:
* Near monopoly telecoms set the prices.
* Infrastructure needs to be deployed everywhere (resulting in near monopolies.)
* Radio transmissions require a lot of power to get to the local tower (or else suffer poor performance.)
* Privacy concerns; data must flow through the provider's infrastructure, and the provider must know your general location.
A publicly supported mesh would have to include micropayments in order to incentivize people to put up infrastructure of their own, and would put the network into the hands of the people. Application software remains lucrative, as does hardware. Route negotiations include automated financial negotiations. This is what I'm getting to. And rather that simply trusting our providers to be nice (a rather naive prospect), it becomes intuitively obvious that the network itself is insecure, and that security rests in the identity of the user and their associates.
The result can in fact be highly robust and performant, without centralized nodes that control routing. Devices of all shapes and sizes can join and engage in the mesh, from radio controlled LED christmas lights to basement server farms. There's a kind of routing called Landmark routing which I personally believe is promising. It basically follows the greatest routing algorithm we know; the postal system.