Each new “Redstone” release of Windows 10 is notable for a handful of reasons, but Redstone 3 could include one of the most ambitious features yet: x86 on ARM64 emulation. What that ultimately means is that ARM-based devices running Windows 10 Mobile, such as the Lumia 950 XL, could see an immediate boost of supported applications.

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Source: Hot Hardware – Microsoft Rumored To Include x86 on ARM64 Emulation In Windows 10 ‘Redstone 3’