Business Insider/Julie Bort
With the acquisition of Nokia, the ability to make money of product licenses has dried up. Warren's sources told him that Microsoft wants to experiment more to discover other lucrative areas
The article mentions that one area of testing will revolve around advertisements in Windows 8 apps.
However, distributing the OS for free can help Microsoft improve relationships with developers.
If the company does follow through with this plan, Microsoft could launch the free OS along with the Threshold initiative in 2015.