From the little exposure I've had of the digital art world (I assume you mean high art as in fancy galleries and such) is that it's much more fad driven. One year the "it" thing is interaction, and so everyone rushes to do that. Then it's AI, so people rush to be the first to publish a book written by AI or whatever.

Say what you will about the current demoscene stylistically, it is to this day an underground, non-commercial movement (maybe countercultural? labels don't really matter, I'm just trying to gesture at something). People make stuff for the hell of it, with themselves as the target audience. It's hard to beat the sheer joy of that.