I am planning a whole project around the iPad after seeing the magnificent David Hockney exhibit in Saltaire, England, of the works he created on his iPad pictured here. There are plenty of drawing apps, but since I've been a subscriber to Adobe Creative Cloud since it debuted, I get.get the Adobe apps on my mobile devices as part of the package.
I've lived through the joke-turned-revelation of digital artmaking. Many of my artist friends remain old school, writing with pencils, sketching on paper, using computer technology for everything dry and nothing juicy. I get it. And I still turn to the pencil and plastic for some work. Digital has just opened a whole vista that adds to the possible. Painting on an iPad is another medium, and as Hockney shows, as legitimate as oil on canvas.