That's correct... they are a completely different instruction set. However, the M1 Apples have a "Rosetta Translation" system that can run some x86_64 code: https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment

So, Armory might still work on the M1-based laptops... but given that Armory and MacOSX were already somewhat problematic, you might be better using a virtual machine (running Linux or Windows)... or waiting until an M1 native build is released.