Today I found new improvement of Google search result from Google.com, It highlights each listing with soft-blue color when you do mouse-over. This is interest that Google adding more interactive. This may use for increasing the ranking signal and user feedback study for them.
[edited by: tedster at 4:32 pm (utc) on Oct 11, 2010] [edit reason] member requested edit [/edit]
Google has filed the patent of "System and Method for Modulating Search Relevancy Using Pointer Activity Monitoring", was filed on February 16 2005, as Google currently used click-through rates (CTR) as signal. The new patent takes the idea a step further, looking to reorder search results by monitoring when users show interest in web content without actually clicking on it.
What do you think about this? I think it becomes more signals on user feedback and social beside currently strong signal on links.