If we consider that most of us have an HD monitor (1920x1080) and a relatively good and new gpu ( i.e. GTX 760 or higher ) ... why would anyone need to buy a new graphics cards ( GTX970/980 ) since you would only get around 60 FPS (i.e. monitor refresh rate ).
Regards
Skroutz McDuck
Regards
Skroutz McDuck