Licensed under the GPL, so Blender could potentially borrow code from this app. for certain features even if it gets something really innovative.
So far, it seems pretty standard as far as Sculptris type apps. are concerned (with the exception of the sketch tools which look pretty similar to Zspheres). Otherwise, it doesn’t yet have much that’s not already in Blender, but I would like to see Blender’s OpenGL modernization include the brush contour drawing directly onto the mesh and the symmetry line (which would be nice usability features).
I guess it may or may not be something used by a lot of people here, but it does have potential for people who mainly use commercial applications for their work (though it really depends on whether this project gets enough momentum to stay alive).