Unifying team/platform and APIs is not the same as unifying the architecture. Windows on ARM, for instance, was previously 'unified' with Windows 8 on the x86/6

Unifying team/platform and APIs is not the same as unifying the architecture. Windows on ARM, for instance, was previously 'unified' with Windows 8 on the x86/64. To the best of my knowledge Microsoft is referring to the former.