Inside Windows 8: Chris Stevens - Boot Environment

Windows on ARM is a new member of the Windows family that builds on the foundation of Windows. These PCs will be built by PC manufacturers and based on unique and innovative hardware platforms provided by nVidia, Qualcomm, and Texas Instruments. https://blogs.msdn.com/b/b8/archive/2012/02/09/building-windows-for-the-arm-processor-architecture.aspx
What is the guarantee that Windows will not suck the life out of the ARM processor?