Google demonstrated conversational search for desktop version of Google Chrome browser at last week’s Google I/O conference, the Google Now like voice search to the desktop is now available to users of its Chrome browser through the latest version of Google Chrome browser (27.0.1453.93).
Conversational search works on natural language and semantic search and more built into it. To use the feature on Google.com, click the microphone icon, and choose to allow the new Google Voice search feature to begin listening. Google will only ask for permission to listen once and from then on users can simply speak in order to search and in some cases the results are spoken back.