About being compatible....

One CAN already use some kind of weight mapping inside POSER.

Not the real thing, but some alternative.

You Can move anything with a displacement map.
One can add flesh, muscles, weight, anything with a displacement map to any textured figure.

But then comes the problem..
How can one "gues the final shape", if it is not even visible before render time??

Conforming clothing will always be too small.
The same for dynamic clothing.
A Displacement map does not exist for the cloth room.
The cloth room calculates the draping around the obj.

Then, during the render, the displacement map comes into play, and gladly pokes through any dynamic cloth... 

If one alters the shape with any form of rigging, mapping, displacement, weight mapping, conforming and dynamic clothing will "HAVE" to know about it, before coming into action.

Just my 2 cents.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!