I wonder why they decided to run the ARM version of Windows though. If one emulates, does it really matter what platform to emulate? Isn’t Windows for x86 still

I wonder why they decided to run the ARM version of Windows though. If one emulates, does it really matter what platform to emulate? Isn’t Windows for x86 still quite a bit more useful (e.g. doesn’t have to run a second layer of emulation to run x86 apps)?