My thoughts on emulation is that it is an absolute necessity in order to preserve the history of gaming. However, it will also probably always be a grey area regarding copyright. Especially with emulation of current gen I find it not okay, since the original creator still earns money with it. But if a game or console is not sold anymore? Nobody loses money from me using an emulator to play Chrono Trigger with save states and increased game speed to make the farming and boss fights easier.