There is no particular reason a mesh network needs to be low power and low throughout - I think one of the most potent mesh network opportunities is (slowly?) replacing in home routers with (firmware?) to communicate amongst a neighbourhood. With that a small and growing group of people will be able to exchange local data and video and voice.

I perhaps naively think that physical proximity will become a major deciding point in bandwidth between two nodes (which makes sense) and this will encourage an explosion of useful local perhaps democratic applications - think of it as garden fence protocol. Sharing not just pirated films but kids calling their neighbours to just chat, parents arranging bar eques etc