For the most part we went from running the game at 320x200 or 320x240 to 640x480 in that first round of acceleration. I think in terms of % change it is a bigger leap than anything we've really had since, or certainly after 1920x1080.
So you suddenly had super smooth graphics, much better looking translucency and effects, and the # of pixels quadupled or more and you could just see everything so much more clearly.