The threaded OpenGL support would be nice to see if integrated into the mapper (even for 2D). The optimized file system access is really interesting to me - hopefully it'll improve on Mudlet's startup time (+ profile selection, and profile loading), which is not the quickestFeaturing Qt Platform Abstraction, threaded OpenGL support, multithreaded HTTP and optimized file system access, Qt 4.8.0 can be downloaded as binary or source packages (Qt Download Page).
Qt 4.8
Qt 4.8
http://labs.qt.nokia.com/2011/12/15/qt-4-8-0-released/
Re: Qt 4.8
Unfortunately mudlet isn't compatible with 4.8 at the moment (at least for me, I'm getting problems with open gl and the 3d mapper)