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At L.A.'s Digital Music Forum last week , Anu Kirk, a product lead at digital music service MOG, shared some bad news for musicians adapting to the current state of the music industry: "It sucks," he said.

Apple's iTunes software has been heralded for the past decade as an example of an application that almost exemplifies what cloud computing is all about. With Monday's launch of iCloud services , Apple takes its digital music offering the rest of the way by allowing iPod, iPhone, iPad, Mac and PC users to store their tunes (and a lot of other content, for that matter) on the company's servers and access it via the Web. For those who want this option, iTunes will now be available online rather than as desktop software

The cash will come largely from subscription services, predicts an analyst/soothsayer. Music stores like iTunes, having already seen declined growth, will suffer. Digital music revenues worldwide could reach $20 billion per year by 2015, according to new report from the research firm Ovum .