Update said to launch in 2015 will reportedly allow Xbox One, Windows, and Windows Phone to share common elements more easily.
If plans hold, Threshold will feature updates to Microsoft's three main operating systems platforms--Xbox One, Windows, and Windows Phone--allowing them to share common elements more easily than in the past. A single app store for all three platforms is also in the pipeline, the report claims.
The Threshold codename is taken from the Halo series. It is the name of the planet around which the first halo ring orbited in the original Halo: Combat Evolved. Microsoft's Siri competitor will reportedly be called Cortana, also associated with the Halo franchise.