Most consumer sound equipment does not produce sound above 16khz. Most pro equipment does not go above 20khz. I personally can't hear beyond 19khz.
Early reports look great.
But still no 30fps progressive video. The first thing to be said is that SVCDs are a good archiving format for VHS quality video, for video that is better than that like DV, you will lose quality. VCD Overview VCDs have limitations but they are a good inexpensive way to distribute family videos, or lo fi indy films. DV isn't film, and it doesn't need to be. Note that this is a theoretical maximum, and that video manufacturers will tell you that there isn't a lens in the world that can feasibly take advantage of the theoretical maximum resolution that film is capable of.