But its $100 for 50 GB. I don't know about you, but 50 GB is about 1/10 of the minimum amount of stuff I need backed up, which is roughly 500GB, but really a full back up of everything (meaning compressed videos and full res, etc) its getting close to 1TB and probably in a year or two it will be 2TB. If the linear pricing continues, I'm looking at $2-4K a year on iCloud. For that much money, its pretty easy to bring my MBP to work every once in a while and create another back up on a personal drive there. Or, I could just create an FTP there and have everything put on my personal drive, my work is not one to care about such usage of their network. I also tend share much of the most important media with family and friends. So, if I wanted to be extra safe, I could just keep a back up at my parents house, much of which they'd want anyway.
There is just no way the PC is going away, per Jobs' vision, if we can't get MUCH cheaper cloud storage. I'm talking at least an order of magnitude, maybe 2, or even 3, as people become increasingly reliant on digital, as opposed to optical, storage of HD and 3D movies, TV shows and family videos.
Its a nice step to keep all your music, or at least a sizable portion of it, synced and available via the cloud I guess, but if that's all its really good for, then its just not worth $100/year to me. But maybe that's just me.