This has been out for a while, but now that I have my Amiga 500 mostly working I'm planning on adding one of these to it, at least for the CPU emulation for a speed improvement. I'll probably also try out the memory expansion and harddrive as well. This should make a kick ass Amiga 500!
The PiStorm itself is an adapter board intended to be paired with a Raspberry Pi Model 3A+. It goes in the DIP socket on and acts in place of the CPU, but functionality can be extended beyond simple CPU emulation.