Qt 5 is the 5th major version of the popular GUI toolkit for implementing graphical applications. This version contains major changes, and Qt Quick is central to it.

Qt 5

Qt 5.0 has been released. Check out the Qt 5 landing page [qt-project.org].

Mission of release

Qt 5.0 will be the foundation for a new way of developing applications, where Qt Quick is in the center of Qt. Qt 5 continues to offer all of the power of native Qt C++, and we don’t want Qt 5 to be disruptive for existing code developed for Qt 4.

Qt 5 enables highly sophisticated user experiences, offering applications the full capabilities of OpenGL/OpenGL ES graphics acceleration. In this respect, Qt 5.0 is a feature-driven release with time-to-market requirements especially for embedded environments. This implies that we should keep the scope of Qt 5.0 limited to the essential, and add more features and add-on modules in the upcoming minor releases.

Source: Excerpted from Qt 5.0 project page