Eclipse 4 Milestone 1.2 aims to simplify the Eclipse programming model, enable the platform for emerging web technologies, and broaden participation. It features XWT for user interface development, CSS for styling, and support for OpenSocial gadgets. XWT allows building user interfaces for applications and elements in editors or standalone windows. CSS can be used to style text, labels, trees, and shells uniformly with dark colors. OpenSocial gadgets can be added through a shortcut key.