Emulation is a great way to revisit classic games. I do it from time to time because I don't like to hook up my old gaming devices. I also have a lot of my consoles in storage, so having emulation as a backup is pretty good. as long as you own the game you're emulating I see no problem with it. I know there's some grey area there when it comes to emulation. Some companies aren't for it, while others think it's the only way to keep video games alive.