Apple Ends Era of Paid Operating Systems

Apple has just ended the era of Paid Operating Systems!!  I was just discussing this as a business model last week... will Microsoft follow suit?  It would be in their best interest to do so.  They have plenty of other revenue makers in their ecosystem, both consumer and enterprise.  And, the business world, for the most part, runs on Microsoft Office.  It's a smart move for Apple; it would be equally wise for Microsoft.