Twitter CEO Dick Costolo announced on the Today Show Tuesday morning that Twitter is launching a new look that allows users to highlight photos and media. The new design is reminiscent of Facebook’s Timeline, and provides users with a more personal and visual feel. The most conspicuous feature is a dominant photo in the upper right that takes up some of the screen real estate once held by tweets. Costolo said the new design will be appearing right away but as the site for now looks the same. Both the new look and the way it was announced confirm Twitter’s ambitions as a major media player. Read the full story at Giga OM.