I once saw an April Fools or some other joke that suggested that some future version of Photoshop could paint your pictures for you using fancy algorithms or whatnot. Well, that day has actually arrived, though it’s a bit more primitive than I’d have liked.
J pointed me to PaintsChainer some weeks ago, and from the moment I saw it I was hooked. PaintsChainer does exactly what I just described: you upload a lineart and it paints it for you. Machine Learning, Whatever, don’t care how. The outputs are quite amazing even if you don’t touch any of its knobs and dials, but they have some flaws and for now I think it’s difficult to correct them.