It’s so good to see more movement in the realm of classic Mac compatibility! Mac OS emulation/simulation has received astonishingly little attention given the immense body of software that exists for the platform.
That said, while this is a great start, what would really excite me is something along the same lines with PPC support, OS 9.x API simulation, and ideally proper FPU and GPU support. SheepShaver and QEMU are too incomplete and hacky to run the majority of apps that interest me.