Microsoft’s ‘Threshold’ initiative will further unify Windows across mobile, desktop, and Xbox One

After bringing the Windows core to Windows Phone and the Xbox One, Microsoft is planning even further integration between all of its platforms in a few years: Say hello to codename “Threshold.”

As ZDNet’s Mary Jo Foley reports, Microsoft’s operating system head Terry Myerson recently referred to the Threshold codename in an internal e-mail regarding his plans for a new unified OS engineering group. Threshold refers to a new slew of upgrades coming to Windows 8, Windows Phone, and the Xbox One, and not a single new operating system project. (And just like Microsoft’s upcoming Cortana virtual assistant, Threshold is a name taken from the Halo game series.)