Yes but the nvidia definitions apply to windows graphics quality like when you see a picture in the monitor if the settings were set to quality and you zoom it to 200% you will see better quality that you will see if the settings were set to performance, even nvidia say this on the options and even have 2 picture examples...
Everyone knows that in games max settings will give better graphic quality and nvidia give the options to do this also in Windows in the settings i show before... It seems to me that max settings will benefit all graphic quality in windows, not only videos but icons, folders, colors, gradations, pictures, movements of windows etc and like in the games a better card will handle better with this.
I dont want to say that i have the reason but seems to me that this is a logical thing no?