Google added some new search tools on its updated top horizontal navigation bar on search results page--now showing, 'Shopping, Applications, Patent, Blogs' etc. that triggers based on the search query.
Based on the query the search tool comes in-front of the nav bar and let you perform the required tasks: for example: "applications" search will show relevant desktop applications related to the search query. And, "Shopping" tool, when clicked takes you to the Google Shopping results based on your query.
Check the screenshots below: