A browser based collaborative CAD tool appears to be a great idea. Rendering is now longer the bottleneck in computation and Nurbs data is actually lightweight.

A browser based collaborative CAD tool appears to be a great idea. Rendering is now longer the bottleneck in computation and Nurbs data is actually lightweight. Computation heavy tasks like the geometry engine could be done locally. However developing a geometry engine or nurbs kernel is quite a challenge- harder than any game engine.