To me art is expression. Art is reaching down inside yourself and using whatever tool you have in front of you to express your feelings, emotions, and share your perspective.
I believe we all have some form of artistical talent, we just haven't all necesarrily found which tool best works for us.
Painters, musicians, poets, dancers, sculptors, graphic artists, and yes even photographers are all artists... Each using a different medium to share their perspective.
In my opinion, even a point and shoot photographer is an artist. Yes, he does not create anything, but by him capturing a moment, a perspective, and a certain lighting on something he is sharing with you his perspective.. His expression. That is art to me.
A photographer uses his tools to express himself just as a painter uses his own. A photographer's tools are different though. He has his environment around him, lenses, angle, lighting, aperture, etc. all to capture one moment of something that has some meaning for him. Even if that meaning is nothing other then it 'looks cool'. Well, that is still his perspective on what looks cool and his way of sharing it with you.
Someone who feels depressed is very unlikely to take pictures of bright flowers. No, instead he will most likely use his environment and any settings he has to use to capture something that expresses how he feels.. a cold, sad, dark, and lonely object.
Using your tools to express yourself in a creative way, that is art.. And I believe that there is an art form in almost all things.
Eat. Sleep. Breathe. Ski.