The document discusses redesigning the user interface in Joomla 3.0. It notes that Joomla's current UI is outdated and inconsistent across third-party extensions. The new UI in Joomla 3.0 aims to provide a comprehensive set of standardized and responsive interface elements to improve consistency across all components on both desktop and mobile. This new "Magic Bullet" framework separates developer concerns from design/styling to encourage adoption by both developers and site builders.