I guess music visualization still has a niche industry in live performance or creating video entertainment. But screensavers...
It's 30 years old now and still going strong, and it'd be right up your alley.
There's plenty of trippy, interesting, or technically demanding audio/visual demonstrations for you to run, emulate, or just watch on youtube.
http://www.geisswerks.com/geiss/
And the author did a bunch of other graphic stuff too: http://www.geisswerks.com/
I guess music visualization still has a niche industry in live performance or creating video entertainment. But screensavers...