@Frank_G: Yeah , nothing can really replace a good 2D tool sometimes.

@gri:
But it's strange how they display voxels; but it's just a starting point.
What Blender lakcs a lot is drawing tools and layers in texture paint mode: lines , cuves , 2D forms etc ...
but it's already an awesome multipurpose tool with impressive features (nodes etc ... ):
-Hard surface modeling
-Sculpting
-animation
-retopology
-rendering

Let's wait