I'm not really convinced curves are that useful as a modelling scheme for non-CAD/design stuff (i.e. games and VFX/CG): while you can essentially evaluate the limit surface, it's not really worth it once you start needing things like displacement that actually moves points around, and short of doing things like SDF modulations (which is probably possible, but not really artist-friendly in terms of driving things with texture maps), keeping things as micropolygons is what we do in the VFX industry and it seems that's what game engines are looking at as well (Nanite).