Re: A Stone that Shatters Windows
That DEC Alpha version of NT also included a translator (FX!32) that allowed you to execute x86 binaries on them. That translator was really useful since almost nobody bothered to port their apps over to Alpha.
I imagine that any major shift from x86 to ARM today in the laptop and server market would probably rely on a translator a whole lot less than Alpha owners did 20+ years ago. There is a whole lot less hand written assembly than there used to be and the tools for compiling cross-processor code is so much better.
With Apple making the shift and with the market rather unimpressed with Intel's attempt at a big.LITTLE-like processor, I wouldn't be surprised if the levee breaks and Windows on ARM moves beyond being a niche product.