Google is improving the app by linking it to google's knowledge graph(a database of culture and concepts ) which will help the app understand the context of queries rather than just relying on keywords.
The update means it works just like voice-powered search on the Jelly Bean version of Google Android.
The update will also mean that, when possible, results will be spoken to users instead of letting them scroll through a list of links.
The voice-powered search function will be available "soon" on version 4.2 and above of iOS, the operating system for Apple phones and tablets as stated by one of the google officials.
Even though the changes to the app were considered one of the baby steps, the expectation is that it will probably work more better than the Siri- apple's own voice_powered software.
bbc