PaQ,
> Dont want to break the humor here, but this mesh fusion is really hot ! (and I'm affraid it makes the first video no valid anymore).

I think it's valid!
Because what you can make after you converted your object in mesh with Groboto, what??? Nothing except the sculpting.... Good base mesh for further sculpting... The cage is dense it is hard to work with this with standard polygonal tools except some kind of brushes. May be there is some option to control amount of polygons I did not see it in videos. But Any way after it becomes mesh you loose all that booleans advantages that you had...
With MOI I can do with model everything I want in any time. And after that export it in poly model..

So is it everything so cool like it on videos for serious projects? I think no.