A company called TrackingPoint have a range of targetting scopes which will do most of the calculations needed for long-range shooting, so you don’t have to. They calculate for range and target tracking, but not wind- which, I guess, is something you can’t work out with an optical system- and should greatly improve the accuracy of shooters with little or no training. Something like this is going in a story, I just haven’t decided which one.

Update This documentary suggests that the sights can take wind into account. It also gives some more information on the weapon system and shows it being used to hunt.