Seems like this has some good security features, but with the move towards universal Https connecting to an unsecured WiFi network no longer carries the same level of risk it once did (other than exposing LAN shared resources). As good as prefect forward secrecy is, anything sensitive should already be being encrypted by the client (router passwords notwithstanding until that problem is solved).

I'd rather move towards a world where you don't need a password to access a WiFi network and people share their internet access freely. This would improve not only access to the internet, but also increase privacy because you wouldn't be able to rely on an IP address indicating someone's identity.