The idea is to keep on forcing people to buy the same music over and over again. Unfortunately, once the 96 kHz, 24-bit music makes its entry in the living room, there is no need any longer for further improvement: humans simply can't hear any better. (Some people claim that they do, well, some people claim to have been abducted by aliens too :-).) Besides, if you look at the utter crap (amplifier, speakers) people use to listen to their CDs, you can really, really wonder what good encoding at the higher frequency range will do. Then there is the problem of the acoustic properties of the room, and so on, and so forth.
So I think the recording industry will continue to sell lots of CDs for quite a while yet :-).