Nathan Willis has written a very good article on Krita for linux.com, Exploring natural media graphics with
Krita, where he describes where Krita developers want to take Krita in the future.

Of course, Krita is and will remain a competent image manipulation application, with cmyk,
lab, adjustment layers and all that jazz, but their core interest is indeed natural media.

Developer, Bart Coppens has managed to make wet paint usable. In this image you can also see Gábor and Casper’s jointly produced layer preview tooltips.