Krita is now v3.0, and get a lot of extra features that could have been showcased here, like performance optimization for very large brushes and canvas, traditional animation module, animated brushes, new blending mods dedicated to painting… Also, a lot of improvements on stability, performance, hardware compatibility and UI have been made, which is a very good thing!
Update (): This article has been writing at Krita 2.9.2.