"The basic idea behind the genre, is that instead of merely capturing a realistic rendition of the subject, the photographer is aiming to produce a more personal - typically more evocative or atmospheric - impression. One might simplify this, by saying that fine art photography describes any image taken by a camera where the intention is aesthetic (that is, a photo whose value lies primarily in its beauty) rather than scientific (photos with scientific value), commercial (product photos), or journalistic (photos with news or illustrative value)."
This is a great resource on the subject of fine art photography. I've bookmarked this page for quick and easy reference that I can go back to again and again. Check it out, here.