Mikelavigne - SACD looks pretty much like output of sigma delta converter before filtering (1-bit). SACD is equivalent to about 20/96 and it supposed to sound better than redbook layer. Problem is that many people dislike sound of any form or PWM (Sigma-Delta converters, class D amplifiers) - they might not like SACD as well.
I've never considered SACD since it was initially too expensive with very few titles and no option to make backup-copy (of very dense disk) not to mention that my music resides on Hard Drive (server).
New standards should be promoted. It should be advertised. SACD should be, initially at least, cheaper than CD - since it doesn't cost more to print and being impossible to copy, prevents piracy that cost industry a fortune. Unfortunately greed took over and they started selling SACDs over $30 a piece killing pretty much any interest (including mine). I remember seeing similar failures with Sony Beta, Iomega Zip drive, Sony Mini-Disc, HDCD, DVD-Audio and few others.