¿Se ha comentado esto ya por aqui?
Zbrush At Siggraph - From My Perspective
Speed, speed and more speed.
SubTools – millions and millions of polygons and support for multiple objects and multiple textures.
3D sculpting with an alpha, texture, and stroke – the power of Projection Master in full 3D.
Mesh Extraction – a fast and incredibly powerful way to create new geometry from existing geometry.
3D Layers – store sculpting and texturing in 3D layers for a non-linear workflow
Topology Projection – transfer high-resolution sculpting from one model to another without loosing the hi-resolution details.
Poly Painting – paint directly on your models surface without any UVs.
ZCasting - Broadcast your ZBrush session to the ZBrush community.
The new ZBrush is significantly faster and capable of handling much larger polygonal models than ever before. The new ZBrush is optimized for 32 bit systems as well as 64 bit systems, taking full advantage of the processing power, multiple CPUs and available RAM.