Der 64 Bit-Emulator ist neu.
Den 32 Bit-Emulator in Windows für ARM-basierte System gibt es seit 2016/2017.
https://www.theverge.com/2016/12/7/13866936/microsoft-windows-10-arm-desktop-apps-support-qualcomm
https://www.theverge.com/2016/12/7/13866936/microsoft-windows-10-arm-desktop-apps-support-qualcomm
Microsoft is enabling Windows 10 to support ARM chips directly by building an emulator into the operating system. Devices will be able to run x86 win32 applications […], but Microsoft won’t be emulating x64 variants of these apps.