It won't replace polygons. But it has been a very useful tool in the gfx programmer toolbox. It can be used for font/vector rendering, modelling / rendering com

It won't replace polygons. But it has been a very useful tool in the gfx programmer toolbox. It can be used for font/vector rendering, modelling / rendering complex shapes that are difficult to do using traditional modelling methods, and it has a lot of niche usages (I remember one talk about using some SDF to procedurally generates fakes).