It's already ended. I have an 8-"core" AMD FX CPU, and I decided to underclock it to 1GHz to see how games reacted. You'd be surprised how playable many games are. Mostly, I guess, because the thread communicating with the GPU does not need all that much power, so frame rates stay semi-playable.
Anyway, with an underclocked 1GHz FX 8350, The Witcher 3 saturates about 5 cores in cities and nibbles on the sixth core. Dragon Age: Inquisition uses up to 8 cores. RiME uses 4 cores. TrackMania Nations uses 1-2 cores.
Generally, AAA games have been post-quad-core for years now.
Anyway, with an underclocked 1GHz FX 8350, The Witcher 3 saturates about 5 cores in cities and nibbles on the sixth core. Dragon Age: Inquisition uses up to 8 cores. RiME uses 4 cores. TrackMania Nations uses 1-2 cores.
Generally, AAA games have been post-quad-core for years now.