My comment about intelligibility refers to a human (with normal audition) directly listening to the output. When the output is used in a hearing aid, a cochlear implant, or a low bitrate vocoder, then noise suppression may be able to help intelligibility too.
Hearing aids have gotten way more advanced in the past couple decades. It used to be that they were just parametric equalization. They now do crazy fancy things involving not just noise-reduction but also directionality.
I also have a real hard time differentiating people talking in Google hangouts, say, especially if they're using silverware on porcelain. Wouldn't this type of noise suppression help in this case as well?
Seems like pretty awesome stuff.