Unlike with reflective art, with digital art, there is no paper and no water. I draw and paint right on the computer monitor with a wireless, digital pencil or brush, and both the rough sketches and the finished art are uploaded to the art director.
I have come to like working digitally, but although there are many advantages to working digitally, there is one disadvantage. There is no finished illustration on paper. There is only a computer file...nothing to hang on the wall, so to speak.