Getting at the point cloud is already possible and although I too would like to see a simple "Export Pointcloud As:" dropdown list of formats, what I would like to see (which I have not seen anyone reference yet) is a way to include the positions, orientation, dimensions, etc. of the camera frusta in the model, à la Photo Tourism, the Photosynth Tech Preview, (and even the current Photosynth data, of course, although it is no longer visible except by iSynth).
To me, the model is incomplete without this data, and that data would certainly be described using "lines or polygons". If you had this camera position information you could go about finding someone in the Blender community or other similar communities who could help you go about beginning experimentation with dense reconstruction on your own time. Certainly I expect community driven efforts to be far less polished than that of professional Microsoft devs and researchers, but you could get a sneak preview Tom.