Since April 2nd 2014, Universal Analytics for Google Analytics is out of Beta, and now available to all.
Universal Analytics now gives everybody the possibility to use the new funtionnalities, such as Remarketing and Audience reporting. Universal Analytics will also allow you to better follow your visitors using numerous platforms, such as PCs, Tablets and Smartphones.
To migrate to Universal Analytics, just click on your Admin Tab in Google Analytics, and follow the instructions.
The detailled documentation to migrate to Universal Analytics is available here: https://developers.google.com/analytics/devguides/collection/upgrade/?hl=en_US
Details about Universal Analytics going oout of Beta is available on the Google Analytics Blog, on the Universal Analytics: Out of beta, into primetime post.