Meaning would depend on the stated outcome, which we don't know. That's kind of what it means to be inscrutable and ineffable. The Arbiter's judgment could very well be absolute, but not designed to be eternal. We know from the very existence of Revendreth and the fact that souls can be redeemed there that it is isn't eternal. Consignment to the Maw may also not be an end for the totality of a given person, either. Perhaps threads can be judged individually, or the Arbiter opt to sever them from the whole. We can only speculate.