This new build of Windows 11 introduces a major upgrade to the Prism emulator that enables support for additional CPU extensions in its emulated x86 processor. These include AVX, AVX2, BMI, FMA, and F16C.
This is big news for ARM Windows laptops. Now according to Microsoft almost every app should be compatible, and they showed Adobe Premiere running fine through emulation.
Technically you use more power if you emulate, both electrical power and processing power.