Klout has done an overhaul and over the days/weeks, you should see changes. One of the most significant changes will be the scoring system. According to Klout CEO and Co-Found, Joe Fernandez, it is one of the most comprehensive and accurate model ever released.
One of the features that you might notice will be Moments. A moment is a social media post that has generated action from the people in your networks.
There are also other features. You can check them out here or you can watch the video below.