The low resolution and lack of pressure sensitivity is frustrating. It feels like I'm drawing with a chalk stick. We can zoom into the image to add detail, but lose sight of the overall structure.

However, as an artist, there is sometimes something to be gained from embracing the confines of a particular medium and learning to work within them. And there are serious artists working with the ipad, e.g. David Hockney:

http://www.telegraph.co.uk/culture/art/art-features/8066839/...