Wait until they do this on crates.io

If the Raspberry Pi is running Windows and the games you want to play were compiled for x86_64 or ARM, yes. The emulation will allow software that was only compiled for x86_64 to run on ARM.

In theory I can play old games on it, like Daggerfall.

Daggerfall is 32-bit app (or maybe even 16-bit?) so it could run on Windows ARM edition for a few years.

There is no official support for full Windows 10 on RPi though, only stripped down IoT version or unofficial loaders: https://www.windowslatest.com/2020/01/27/windows-10-arm-on-r...