The lawsuits that will happen when someone implements this are going to be interesting. Artists tend to be very protective over their styles: http://en.wikipedia.org/wiki/Leibovitz_v._Paramount_Pictures....
Also, artists tend to evolve over time. Few artists like to remain stuck in one style for fear of being thought as unimaginative or lazy (you could look into all the flak Ansel Adams gets). Also some like Kinkade made their style into a business and people expected a certain style so he could not get away from that.
Most successful photographers evolve their style over time --Winogrand, Friedlander, Eggleston, Atget, Frank, Moriyama, etc.
http://en.wikipedia.org/wiki/Leibovitz_v._Paramount_Pictures....
[edit] that apparently HN lops off. I haven't found a way around it.