Nokia's Qt Labs has released Qt 5.0 Alpha, calling it the first major release of the C++ cross-platform application framework since the more open development community, the Qt Project, started. The last major release of Qt, 4.0, was nearly seven years ago, in June 2005, with regular minor releases since then adding many features and culminating in the most recent, Qt 4.8, which introduced Qt Platform Abstraction (QPA) and various other improvements.
Yes. I hope FET will compile in Qt 5 without many changes. Just add the widgets (conditionally, if compiling on Qt 5) module in src.pro.
greaterThan(QT_MAJOR_VERSION, 4) {
QT += widgets
}
like on http://wiki.qt-project.org/Transition_from_Qt_4.x_to_Qt5