It is less about the development of ARM on desktop and more about software support. Most apps on Windows are still emulated. Some will not work at all. Games are kind of a mess on ARM. A ton of security software that IT departments require are only going to work x86. Businesses run legacy custom applications designed for x86. Some major applications still run on emulation only and are therefore slower on ARM.

Apple can force the transition. It is not so straightforward on Windows/Linux.