Me, I don't think it will crack cracku's world. I made my decision to go Android on with my phone and as far as I am concerned cloud is all about interoperability across a range of devices. That is the only advantage to compensate for the fact I have to be on a network. I'm happy with Evernote, Dropbox and Google Docs.
Therefore, iCloud just isn't something I am going to use.
But had I gone iThing I think the iCloud would make it very easy to justify having everything Apple. That way it all works together easily, right?
I think it also makes iThings more attractive becasue you don't need to tether the thing to a PC or Mac with iTunes anymore.
In the end I think it will lead to a harder Apple Vs The Rest of The World split.
But the really interesting thing is what do you think?