All of the benefits we have seen of Arm devices completely disappear when you put Windows on them. I can’t imagine a Windows Arm computer actually having good battery life if it has to spend all of its time doing emulation.
On top of that. Windows runs horribly on the type of energy efficient, relatively low resource devices like ChromeBooks and iPads.
Not to mention that outside of Apple designs, Arm processors are really not that performant.
Yes I know Amazon is doing custom silicon for servers and networking chips. But that isn’t really relevant.