Microsoft is working on a version of Windows 10 that will run on ARM hardware. Unlike Windows RT, the version of Windows 8 that powered the original Surface and Surface 2, this will be a full version of Windows 10 with an emulation layer that allows it to run traditional desktop apps from outside the Windows Store.
ARM PCs have some advantages over x86 ones. They have built-in LTE cellular connectivity, often offer better battery life than Intel and AMD CPUs, and the hardware is less expensive for manufacturers. Future ARM CPUs could pull even more ahead of Intel and AMD CPUs and offer much more battery life, for example.
Microsoft would like Windows 10 to run on ARM hardware so it can reap those benefits. Sure, you probably won’t use an ARM desktop any time soon, but ARM could be a great choice for tablets, 2-in-1 convertibles, and even smaller laptops.