TheAnimus
Now as the iTunes store still isn't 100% DRM free, I wouldn't trust for a second that you could use the iCloud to launder your music collection…. It really as such strikes me as a restrictive way of synchronising devices, you can't actually get the full library functionalities which Spotify and Zune subscribers enjoy.
It's not the same as Zune or Spotify though, I could setup iCloud to sync my current iTunes purchased music to all my Apple devices (iPhone, iPad, MacBook, iMac, stream through my tv via AppleTV etc) for no charge.
If I want to get access to my MP3 collection that i've ripped from CDs over the years too I can sign up for Match at $25/year and immediately after signing up it can scan my MP3s and make all the matching tunes that are available in iTunes available in my iCloud and begin them syncing to all my devices. I only have to upload any tunes that are not available in iTunes. So 5,000 of my tunes that were previously only on my hard drive available on the iCloud in minutes. Now sure I can't burn them to CD, but I don't need to they're already on all my devices, my laptop, my desktop, my phone.
*all listed as a theoretical Apple devotee who has all the Apple devices, I do know some, but i'm not one.
So in essence it's free, but you can subscribe to have your personal back catalog available, but even then it's only $25/year - Spotify Premium is £120/year - don't know about Zune it won't tell me unless I create an account - but they give a different service anyway.
In the end it will work, why ? because Apple said it will and will hype the poo out of it ? if that's they way you want to see it, that's cool, but I see it more in the same way as most Apple products - because my mum could work it without any significant assistance.
:)