I also wonder - which perhaps might sound bit naiive, if is there a chance that ARM will enter on PCs and we'll see combined architecture motherboards or at least some daughterboards with these processors; kinda similar to accelerator cards from Amigas.
Microsoft botched this circa 2012 by only allowing store apps for the RT tablet but I think they reversed this. It was always a product decision rather than a technical one, though. (I don't know why exactly, but they didn't want to let people recompile old software.)
There is also a lot of software for which the source is not available anymore.
But it's neat that it works... there are plenty of simpler enterprise apps that would run just fine without a ton of performance.
Certainly performance wise - better than expected, but gets down to what DX level the game is using, Rpi's not known for much graphics grunt. Though these two examples running well on the rpi4 with windows 10, better than you'd expect and kinda impressive.
+ developing Windows GPU drivers isn't trivial
Even h264 video acceleration is there: https://github.com/Const-me/Vrmac/tree/master/VrmacVideo
Too bad h265 hardware decoder doesn’t yet have a V4L2 driver.
Mainly wondering if I buy an ARM Windows device today, is it just a matter of upgrading Windows somewhere down the line for x64 support? Or will I have to shell out for brand new hardware?