can you? There's a MAME driver in macprtb.cpp you could work off—might want a few hacks in your implementation which is nothing new to Mac emulation. also this: https://github.com/evansm7/pico-mac
Came here to say something similar. A laptop with a high quality transflective screen (e-ink is a touch too slow) that can run classic Mac OS with absurdly long battery life would be a nice little device.