You may notice that we’ve given the user interface of the browser a facelift in this beta. As previewed on the developer channel in June, we have streamlined the upper toolbar, made the Omnibox more approachable, and condensed all of our options into a single menu. We hope that these visual changes will make Chrome feel even simpler.
Last, but certainly not least, our new beta release continues to be faster than before. Compared to our previous beta release, our newest beta hits a 15% speed improvement on the V8 benchmark, and a 15% improvement on the SunSpider benchmark, both of which measure JavaScript performance. Additionally, we’ve improved by 64% on Mozilla's Dromeao DOM Core Tests.
Source: Chrome Blog