Google Chrome has been updated to support retina graphics in those new MacBook Pro’s. It has also gotten some additional functions such as built in support for microphone and web camera, which means that it no longer needs to have plugins such as flash or silverlight installed no more. Though this requires that your website supports Google’s own API.  Finally Google has also implemented support for Google Cloud Print  and support for gaming controls through Gamepad.

Source: GOOGLE CHROME BLOG