haha.. funny that you mention art rock because I'm in an art rock band >.<
I guess my point is, if you are willing to accept obscurity then you free yourself to do whatever you want. And, there are at least some people out there who will appreciate it, and even communities that are ready for the experimental and avantgarde. Small communities most likely, but isn't that going to be more like the Web1.0 experience? You join a forum and get to know the people there, form actual relationships, and share creations for the fun of it. But yeah, don't expect to make a living this way...
As I said I've been toying with game development since before 2000 so I wouldn't say I missed it, I spent many years using BYOND and even released a couple games there.
Since you mentioned music... there are people pushing the envelope, and listeners enjoying it. You just have to search for them. Like Sevish, who writes microtonal electronic music:
There are only as many genres as we imagine there to be....