There still arent a lot of Windows 10 PCs or laptop computers on the market with ARM-based processors, but folks who do have those machines will quickly be able to run 64-bit x64 apps on them. Microsoft says it will at last roll out 64x emulation to Windows Insider testers in November.
Windows 10 has actually been able to replicate 32-bit x86 apps on ARM for a while, together with native 32-bit and 64-bit apps. Support for x64 emulation will permit those systems to run a far larger choice of software application. ARM-based Windows PCs and laptops will have far enhanced energy.
Windows 10 for ARM will support 64-bit x64 apps through emulation – Engadget
