Extension by scripting language that would allow to use tools trough scripting patterns and compute basic geometry with sketch tools.
You can contact me on email when it comes to details.
It can end up in a way that one could draw symetric tesselated textures on a surfaces of OpenSCAD models, therefore it would be optimal designer place if manufacturers supply models of their products, it could go up to 3d "drawn" tool for designing composite at least 3D spaces, that could look like painted stuff.
Best artsy software ever.