Microsoft Research are at it again!
Project Gustav takes digital painting (at least) one step closer to looking like authentic brush paintings, giving it an un-paralleled level of realism:
“It achieves interactivity and realism by leveraging the computing power of modern GPUs, taking full advantage of multitouch and tablet input technology and our novel natural media-modeling and brush-simulation algorithms.”
You can see more info and a video over on the Microsoft Research site here:
http://research.microsoft.com/en-us/projects/gustav/default.aspx