In case of Vladimir Putin, Google added results from Google News, Google News Archives and Google Blog Search - all on the main Google search page.

Currently, the website thumbnails are displayed only for the Google News results placed after the top three organic search results.
Hope it's just a temporary experiment else it may bring some bad news for regular web sites that are also displayed in the organic results - thumbnails will help draw the attention of search engine users and may alter the traffic on regular websites that are display in Google Search results sans the thumbnail.
