Google will release a new "Knowledge Graph" feature this week. For certain searches, the graph will pop up in the right hand column of your search results and provide data which can be used to, for example, disambiguate the search -- if you searched Taj Mahal, you might see data for the musician as well as the building.
For more information, see the Atlantic article as well as the entry on Google "Inside Search" blog:
Google Gets Back to Its Roots With New Search Update - The Atlantic
Inside Search: Introducing the Knowledge Graph: things, not strings