Caporegime
Microsoft is surely and slowly adding to Windows on ARM. Right now all Microsoft Windows apps (I know, low bar) are available native on ARM. This wasn't the case 6 months ago. Office wasn't available on ARM (it ran through full emulation), now it's hybrid (core functionality is native, extensions are still x86).
https://www.notebookcheck.net/Microsoft-makes-more-progress-with-64-bit-Windows-on-ARM.465903.0.html
https://www.notebookcheck.net/Windows-10-on-ARM-64-bit-app-support-inbound.296430.0.html
You hear about them every month. Microsoft is pushing ahead with Windows on ARM. There are also ARM Chromebooks now and they're excellent products.
As for the "show me the ARM chip" question, there aren't many because we're at the beginning of this transition. ARM servers are already here (AWS) and more will come (Ampere Altra). Fujistu ARM workstations will arrive this year, Apple ARM macs will come this year, and more and more laptops and eventually ARM desktops will come. It hasn't yet at this very moment, but pretending like it's not happening doesn't make it go away, it is happening.
When will an ARM CPU run Insurgency at 300+ FPS, render height maps faster in World Machine, bake textures in Substance Designer and bake lighting in Unreal Engine faster than X86 from Intel / AMD?