First off, the Qt tool-kit is now being developed in a public Git repository, which can be found at Gitorious. Qt is now being openly developed to hopefully spur additional community contributions whether it be code, translations, or other work. The Qt Creator IDE, the discontinued Qt Jambi, and other Qt Software projects will now call this Git repository their home.
Qt's plans for a 3D portability API sound a bit like the work Intel and others have been putting into Clutter to simplify the development of OpenGL and OpenGL ES programs. The 3D enabler action item consists of "Provide APIs to simplify creation of 3D applications with OpenGL, including math primitives for matrix multiplication, vectors, quaternicons (client-side) and an API for vertex and fragment Shaders. Future research will be done on stencils, vertex buffers and arrays, texture manipulation and geometry shaders."