Whats kind of cool (to me anyway) is the now FPGA based game machines are making a comeback. Being able to in software define the exact hardware specificaation

Whats kind of cool (to me anyway) is the now FPGA based game machines are making a comeback. Being able to in software define the exact hardware specificaations of older consoles is pretty cool. Where as previously using general purpose RISC or CISC CPUs and have everything emulated as a software application.