> My suspicion is that in 20 years, many of today's games will be forgotten but people will likely still play FFIV on emulator - not because some artistic quality were better but simply because you can.
Inn 20 years, emulators will probably progress enough that the (non-server-based) games people still care about will be playable -- anything where there's no server, or the server is just a DRM check and all the gameplay happens clientside. Some of the servers will probably be replicable locally for single-player or small-group play, too; I think there's already reverse-engineered server emulation for some online-multiplayer DS games, some of it even having been made before the official servers went offline.
Inn 20 years, emulators will probably progress enough that the (non-server-based) games people still care about will be playable -- anything where there's no server, or the server is just a DRM check and all the gameplay happens clientside. Some of the servers will probably be replicable locally for single-player or small-group play, too; I think there's already reverse-engineered server emulation for some online-multiplayer DS games, some of it even having been made before the official servers went offline.