Here's the presentation that was given at Build 2017 about Windows on ARM and how it works. It also includes an explanation on how the x86 emulation(for Win32 applications) works. Based on the presentation, a Win32 application should work without any changes.

Here's the presentation that was given at Build 2017 about Windows on ARM and how it works. It also includes an explanation on how the x86 emulation(for Win32 applications) works. Based on the presentation, a Win32 application should work without any changes.
https://channel9.msdn.com/Events/Build/2017/P4171