The Wall Street Journal this week reported that Apple has reached agreement to stream yet another chunk of global music, the entire catalog of Warner Music Group, ahead of its widely expected launch into a streaming music service. The accepted wisdom is that this will be more like Pandora, and carry advertising and be free, but also come in a paid version, so will also hit directly at the heart of Spotify as well. Let’s be clear about this, in years gone by, when Microsoft placed new services (like Internet Explorer) on its Windows home screen , and charged little or ,better still, nothing, for them, then because of the widespread usage of Windows this meant it was going to…