A couple weeks ago, Google updated Chrome for Android with some new features, and indicated that an iOS update would be on the way. Today, Google launched that update.
Chrome 27 for iPhone and iPad comes with improved voice search, faster page reloading, and some stability/security improvements and bug fixes.
"Say what you want and get results back without typing," Google says of the voice search feature, adding that it also includes faster voice recognition with text streamed on the fly, and the ability to et answers spoken back to you with web results tailored to your questions.
The Android update included the ability to see search queries in the omnibox (as opposed to the long search URL). This is not mentioned in the feature list for the iOS update.
The update is rolling out in the App Strore.