If I may be allowed to put my two cents in, yes I'm annoyed by this move, for several reasons. One reason, not my main one though, is that there really seems to be no practical reason to make the edges of the iMac thinner. Looking at my 27" unit head-on (yes I bought one), it looks exactly the same as my early 2011 iMac... and I'm not likely to be using it in a sideways manner anytime soon. So there really is no increased practical or aesthetic appeal to the extra thinness. Maybe it's some sort of sales gimmick. After all, turning out snappier hardware in the same boxes year after year doesn't give that "new product" aura in the store.
So I bought a superdrive to go with, and use it to import my CD collection to iTunes. No big deal. EXCEPT...
These moves by Apple, Microsoft, Google, and now Adobe, to get users involved in "The Cloud" is actually a major annoyance for me. Reason being, it creates a dependence, and pushes users into providing a steady stream of revenue for the corporations involved. For Apple's part, they make it way too easy, IMHO, for users to engage in impulse buying through iTunes and the App Store. The inclusion of smaller capacity, solid state drives on the Macbook line makes this method of purchasing media more necessary, too.
The other thing is, iTunes hardly ever has the albums or films that I want to buy. I watch obscure dramas, and listen to Japanese music. I have to order this stuff most of the time. Even if it were to become available, I really abhor the idea of having to repurchase everything on iTunes, just so it will be available on my computer. I don't intend to repurchase movies I've collected or albums by American or British bands that I already own, either... just so they'll play in the cloud.
These issues aren't dealbreakers for me. I still love my Macs, and intend to keep using them until it is no longer practical to do so. It is annoying, though, to think that someday it might be.