As those of you familiar with Google's new Material design would expect, the new Chrome Beta has a decidedly flatter look, and interacting with, say, the address bar, provides better feedback through animations. The Tabs window has also been changed -- for one, you can no longer see how many tabs you have open (a bug?), and the look has been changed to, again, a flatter one. Lastly, it should be mentioned again that not all parts of the app have been skinned just yet -- the Settings menu, for example, is still stuck in the pre-Material design era, and so is the default homepage with your most visited bookmarks.
Again, this is definitely not final, so further tweaks will likely take place. That, after all, is the purpose of Chrome Beta -- to test out new features and changes before they're made public with Chrome.