So, basically an emulator layer that doesn't need a host OS? (I'm not really interested in running Darwin, but that's a cool concept)
"An ahead-of-time and just-in-time compiler translates arm64e code to x86-64."
No, not the same, actually. It's more of a Rosetta, but other way round, if I understand this right.
I guess one could call it a "bare-metal/type 1 emulator" much like VMs can run in a "bare-metal/type 1 hypervisor".