Noob questions: Can I run Windows like this? Does it enable Qemu support? Can a non ARM OS be emulated in ARM hardware? (Probably not by hardware extensions, right?)
There will apparently be an ARM version of Windows 10 for the pi, but that's a cut down version for internet of things type apps.
You can emulate x86 on ARM with something like QEMU. But the performance wouldn't be good enough for any modern OS.