iTunes, One Billion Suckers Served?

Thomas Hawk writes "Apple is out hyping their one billionth iTunes download today, but is building your music library in a format that could be obsolete in the future really the best strategy? Will the consumer once again have to someday replace their iTunes track just like they had to replace their LP, cassette, and CD only to get their music on their hot new non Apple mp3 phone of the future? "