With the proposed DSP, the Amiga would have CD quality audio (since th DSP would have had the bandwidth to drive a nice stereo 16but DAC), plus I assume the existing audio capabilities. It would have be very welcome.
The DSP chosen was very powerful and would have allowed some quite advanced audio processing for the time.
If you watch Dave Haynie speak, he also points out that the DSP was "general purpose", and could be used as essentially a super fast DSP for graphics/3D work too...
