You know what's fun? Comparing high and low PC settings and scoffing at the poor buggers who have to put up with lowly console quality. Let's dive right in.
Bean_Patrol has thrown together a set of screenshots showing the comparison between high and low settings for GTA 5 on PC that you can peruse in the gallery below.
It doesn't really look that bad at the lower end of the scale, but the higher settings do add a little pizazz.
You can also check out the uncompressed images here.