Xbox Live is used by Windows and Xbox games for achievements, friend lists, and matches. Apparently, the Microsoft is looking to push Xbox Live cross-platform 'in a big way'.
A recent Microsoft job posting reveals some details about the plan.
"We will create a modern framework that is open-source, lightweight, extensible and scalable across various platforms including Windows Store, Windows Phone, iOS, and Android."
In order to get developers on-board, Microsoft will reportedly have fewer restrictions and offer better tools to help developers integrate the functionality into their games.