Glitch has a long history in music and other art forms too, its common for more innovative EDM artists to actually open up their synths and mess with the circuits (circuit bending), or record sounds to CDs and then draw on the CDs with sharpies to produce glitch effects.
I also kind of feel like its an answer to the analog-heads, who ONLY shoot film, or ONLY record to reel-to-reel, or only use a darkroom. Granted, they have reasons for doing these things, but glitch art shows that digital mediums are also valuable, and also produce desirable results.
On the subject of glitch art, thought it was pretty funny that Deadmau5 put a glitchy version of october on his album....
"Invest in hookers and blow. The stock market is going down but the coke will always get you high." - theabortionator