Shared interfaces used by browsers and apps alike. JSON will rule the interface, JS will continue to dominate the client side but you'll never see it because it's something generated by your server side framework if the client is not 'native'. Browsers will be the step-up to downloading an APP or a plug-in to the browser.

Pendulum comes fully around, it's already happening in some arenas.

Would you like to download 'facebook' to enhance your browsing experience?