I hope so too. I have a Pi and have seen but not tried the Amiga emulators on it. It's not going to be an FPGA Arcade by any stretch; I don't know the state of ARM based versions of Amiga emulators, but it's something I would love to see.
All Amiga emulators are single-threaded AFAIK. The quad-cores would be wasting time on 3 of them waiting for the first one to finish running all of the emulation code.
IMHO, we either need an FPGA Amiga or a multithreaded emulator. Personally, I think the development time of the former would yield higher performance results than the latter, while the latter would be more compatible.