I'm not really sure i expect Sony to "care" what i think. Sony's priority in agreeing the DSD format was to allow them to digitally archive their backcatalog before the tapes turned to powder.
As such Sony's core objective was to find an encoding process which would provide as much of the musical information as would ever be required so that if the master tapes were lost they would never suddenly find their digital archives were not really good enough. 24-bit or even 32-bit PCM encoding just doesnt solve the problem.
see a mention:
Tom Jung explaining his issues with PCM
I am sure that MP3 and hard disk served audio will replace the CD player in the bedrooms of most young folk and this will continue as they reach their twenties. But this doesnt make them sheep, it just means, to them lots of cheap music is more important than having fewer, expensive CDs and very expensive equipment.
So CD will go the way of LP?
Thats interesting because the youth are by far the most responsible for the fact more vinyl is sold now than 15 years ago. You go into the home of many late teeners/early twenties and they will have a pair of turntables and 1000+ vinyl recordings.
My point being that there are gen pub who don't care about audio at all. Then there are gen public who don't give a toss about audio quality, but they do love music - they want lost of choice and convenience for playback. Then there are lots of people who will continue to buy music in a nice case, with a sleeve and they like 5" shiny disks because they are big enough to be seen and to look at and listen to. Yep they may well run a multi-format machine.
Whichever way you slice it i think:
1. DSD represents a good process of encoding (better than PCM)
2. I think high capacity DVD disks (which SACD is encoded onto) have a decent longevity
3. I think for pure essence of the music SACD does the best job
4. Do I think it will supersede CD? No.
CD didnt kill vinyl and DVD-A, MP3 and SACD wont kill CD....