Digital art is what I call my work.  Sometimes it's Digital mixed media depending on if I've scaned colored in the computer or done in computer and printed out and painted over it, then I call it mixed media.

 

Most of the trade magazines that deal with photoshop, 3d, painter et al call it Digital artwork.

http://www.ballisticpublishing.com/books/expose2/

Expose books call it ""EXPOSÉ 2 is the second edition of the industry's most recognized annual art book celebrating the creative talents of digital artists worldwide."

of course sometimes I call it doodling in my Barbie and Ken program.  But I'm often called a jerk.