I updated to the drivers before this (the ones Trax posted about) as Crysis had horrid black textures covering half of some maps, meaning I couldn't see the enemies while they could clearly see me.
So yeah, some driver updates are obviously a good thing, but unless you need to get them for a specific reason, I wouldn't bother updating as often as they are released. Every few months is good enough for me, unless there's a problem!