However powerful Raspberry Pi’s get, most people are never satisfied anyway and end up frying it by overclocking to the max ?!? I like to use mine at the stock speed (or retropie safe defaults) the way it was intended when it was built. Any Android TV device, which are very cheap now, can wipe the floor with the Pi on every emulator. For example, ePSXe on Android has almost 100% compatibility. They even ported some of the code to the PC version of ePSXe because it is so good.
I’m not sure why they added a 64-bit compatible processor, there isn’t even a 64-bit operating system yet. I suppose it’s just for future proofing. The Pi wasn’t actually made for emulation, it’s just possible to do.