I've just finished giving my presentation on HTML Web Apps in the wild at HTML5DevConf. The Wifi stood up so hopefully the second screen experience really helped to demonstrate how realtime web technologies, and of course Pusher can be used to enhanced interaction and engagement within applications.

You can find the slides, 2nd screen app and the slides in "controller mode" via:
https://www.leggetter.co.uk/pres/html5devconf/