Microsoft official told:
Structuring the OS as a distributed system more closely matches the structure of some increasingly popular programming models for datacenter applications, such as MapReduce and Dryad, where applications are written for aggregates of machines,
This project was started way back in 2007 along with another science & technology university, ETH Zurich. Project team has ensured that very soon a comprehensive version of the software will be made available.
We are exploring how to structure an OS for future multi- and many-core systems. The motivation is two closely related hardware trends: first, the rapidly growing number of cores, which leads to scalability challenges, and second, the increasing diversity in computer hardware, requiring the OS to manage and exploit heterogeneous hardware resources.