That was interesting. Like all things though, it really comes to a question of media. With Sony and Phillips on the side of SACD, it is likely that SACD could be the new VHS, since Sony owns Sony/BMG Music and Columbia Tristar, and Philips owns Decca/Deutsche Grammophon. Between them, they are major players in the software market, with BMG having a huge stake in the pop/rock/dance market, and Decca/DG being massive in the classical arena.
An interesting point is raised in the discussion of resolution and frequency though. It's too easy to assume that the higher-frequency sampling will render a more faithful reproduction, but this is only really for regular waves, which music most definitely does not produce. Therefore, the higher resolution of recording will pick out more subtle variations in the waveform even if it is not swinging through vast amplitude changes.
Anyone truly interested in these phenomena (that means you Pako) would do well to study a little on how humans hear. I would recommend Brian Moore's Introduction to the Psychology of Hearing now in its fourth edition. It's not particularly cheap, retailing for £26, but it's an excellent discourse on the human hearing system. It was the text we used when studying Psychology at University, although it can be read by the lay-person, especially if they already know a little about sound and physics.