That was about game development, not processor design..
thing is, atm graphics can't use 4 cores at 100%. yet, no developer is interested in using the remaining power on improving other parts of the gameplay experience, as long as today the difference between games regarding sales is only given by the graphics..
hopefully, all of them will achieve photorealistic graphic soon enough.. and then they'll have finally to look for other ways to make the difference between games when it come to sell them
Remember the old spectrum days? fitting up all the graphics and coding into only 48/64/128k of memory was a time which guaranteed similar graphics to most of the games.. and the result was that game developers were focused on making interesting gameplay in order to make their games stick out of the on-market mob..