It's fairly obvious that CD's will will cease to be available in the not too distant future.
Okay, even if every manufacturer in the world stopped making CDs, and every retailer in the world stopped selling them (neither of which will happen),
there would still be millions upon millions upon millions of CDs floating around. You know, kinda like there are still millions of vinyl LPs out there for those who care to find them. Times about a hundred million or so.
And in case you haven't noticed, CDs have a pretty long shelf life. Some of the original releases I bought back in the early 1980s are still on my shelf and play exactly the same as they did then. And if I can still go to the store and buy a phonograph, I think it's safe to say that a few decades from now you'll still be able to pick up a CD player.
If their "days are numbered", where exactly are they going to go when time's up? Spontaneous combustion?
Why are there so many people who feel they need to make big sweeping claims about The Future of Audio? If CDs are ever entirely obsolete, A) they'll still all be lying around and very usable, and B) it'll be because a better -- not worse -- equally inexpensive, portable format comes down the pipe. Not because everybody will have thrown their existing CDs into a giant bonfire because they're so pumped about their MP3 players.