Not only does the Windows 8 Google Search app enable you to type (or speak) your queries, it includes a rudimentary web browser to enable you to see the results within the app, as well as access other Google tools such as Gmail and Maps.
Like many Start screen apps, it suffers from too much blank space, but it's an intuitive tool that will be of particular interest if you're heavily invested in the Google ecosystem (you can easily call up your Google search history, for example).
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