I have had a tough time emulating even OpenStep on x86, excited to see NeXT attempt to be run semi-natively. It is still one of my favourite architectures and members of the home server farm. Looking forward to seeing where this ends up.
Previous has been around a while already, and works well. It emulates "Black Hardware" (Cube, I think.), and will run even very early versions of NeXTstep. You should give it a try!
