We know that Microsoft is
working diligently on the next iteration of Windows, referred to internally as Windows Threshold, and externally, most call it Windows 9. While we do not know if Microsoft will refer to it as Windows 9 when the OS goes public, Nadella did take a bit of time on the earnings call to talk briefly about the upcoming platform.
On
the earnings call, Nadella talked about how they will be combining the Windows effort. He said that they will streamline the three operating systems into one converged operating system for screens of all sizes and that they will unify all of their stores to make it easy to discover apps that work across the entire ecosystem too.