Dominique - I think you're right. DAZ has said D|S will have weight-based rigging. I don't know if it will be part of Victoria 4 or not, but dolllars to donuts, they are planning to make characters with advanced rigging eventually. (Probably with a P4 version for Poser users.)

I think Ynsaen is right, too. Poser and D|S will begin to diverge, unless they collaborate on an advanced rigging system (which I suspect is highly unlikely).