In an interesting Fingershack .plan update from NVidia's Chief Scientist, David Kirk, regarding the inclusion of anti-aliasing in the TNT/2 drivers.

The first solution performs sophisticated scene analysis (on the entire scene buffer), which identifies silhouette edges that require antialiasing, and that rejects interior edges which do not require antialiasing. The antialiasing is performed as a second pass, blending the edges after all polygons have been rendered. Not all edges are anti-aliased, but we attempt to make a good choice and smooth the most jagged edges without too much cost in performance. Higher quality antialiasing can be achieved through enabling a hardware contrast reduction post-filter. This advanced level of antialiasing is available through a control panel setting. The second pass edge anti-aliasing is available by default if the application requests anti-aliasing - we report this capability in D3D.