Apple released Mountain Lion to developers last week, a new operating system that will make your desktop computer work more like your phone than ever before.The trend is clear: The desktop operating system will merge with the mobile OS in the coming years. The question is: Why?Let's start with the trend itself. First off, Apple is integrating cloud services much more deeply in Mountain Lion than any previous operating system. That means your music, photos, calendars, contacts, emails and more can now stay in sync across your phone, tablet and Mac.