When you see a strong, social visual interface like Pinterest or Instagram, or even the revitalized Facebook and YouTube interfaces, you realize how far social search has to come. Search engines are generally not visual, don’t port well for sharing to networks, and are closed to commenting.
Google, Bing and Yahoo! index a blend of news and social conversations, but this early concept of social search is pretty stale.
The content presentation and simple link interaction is very 1.0 with text links, and a complete lack of dynamic commenting and sharing.