> A model B Raspberry Pi or even a Zero (if you can get one) should play NES games perfectly fine

Last time I tried this, some of my favorite games were super laggy (Yoshi's Island, Super Mario RPG) presumably due to having to emulate additional processors (Super FX, SA-1, etc.)

edit: Oh wait, this is NES we are talking about. Nevermind, I'm sure NES runs fine. I'll leave my comment up for anyone wanting to talk about SNES emulation.