In the same Q&A session, Huang spoke about NVIDIA's history with the NV1 "media processor" chip, which had built-in sound as well as graphics. He disputed that notion that NVIDIA is primarily a "graphics company," and then suggested that the GPU is going to evolve and expand beyond graphics to include other kinds of digital media.
Based on all of that, it doesn't sound to me like the next SoundStorm is likely to find its way into a future nForce chipset. Instead, some future GeForce seems like a more likely place for SoundStorm to appear, as strange as that sounds. Of course, it's all speculation at this point, but in one form or another, SoundStorm will someday return.