I already have Surface Pro X, and I just bought this. It's like a Surface Pro X Lite, and it's less than 1/4 of what I paid for my Surface Pro X including accessories. Benefits of Windows on ARM (WoA) devices are no overheating, LTE connectivity, fanless, great battery life, instant-on, and full desktop browser. You can't get a full desktop browser on an iPad or Android tablet.
If you live in Microsoft's ecosystem, and don't like Google's, then WoA and the upcoming Windows 10X devices are for you. If you don't have any preference for Microsoft's ecosystem, and prefer Google's instead, a Chromebook is a similarly priced alternative. You get almost all the same benefits above but with the negatives of overheating, fanned x86 CPUs and no LTE, on almost all Chromebooks. Only a few Chromebooks are based on ARM64; and all with Chinese ARM processors, none with Qualcomm Snapdragons.