(Image courtesy Gary Hazlitt)

DC Spensley (aka DanCoyote Antonelli in Second Life) has coined the term Hyperformalism to describe abstract, pc-based artworks:

Hyperformalism is a critical construct that may be employed by to describe a late 20th century, early 21st century mass art phenomena consisting of scores of personal computer users generating abstract, often spacially unique artworks with software tools.

Gary Hazlitt recently reviewed Antonelli's multiuser SkyDancer performance in Second Life, and you can visit the Museum of Hyperformalism for older works.