It will be a good opportunity for people to try out OS X and see its qualities, and eventually switch to the Mac. But frankly, the PPC architecture being much more complex than the x86 architecture, I don't hold high hopes that PPC emulators will ever be fast enough to be usable, or at least close to VirtualPC. So I don't know whether people will get a good impression of OS X.
For the price of CherryOS and the hardware needed to get a remotely usable speed, one might as well buy a used iMac.