Also need to replace the ARM-emulator for PPC with a something like Shapeshifter for Amiga, "virtualization"?, off the CPU and a memory area.
But with a 624Mhz Xscale(Newton 160Mhz StrongArm) and 128MB ram(Newton 4MB+storage) one could have two newtons-emulators running side by side on a 640x480 screen.
Thats what I call a upgrade:-)