A good proportion of the art-as-art world either finds new and original ways to push craft, or focuses on medium facilitating message(which in turn falls neatly into the product-marketing framework).
;)
Edit: of course this would be a horrible future. Also, there's no way these now old guys could recreate the magic they experienced together in the early 90s.
Example:
https://www.youtube.com/watch?v=LIIBRr31DIU
(make sure to enable the thirdparty english subtitles)
William Gibsons poem Agrippa [1] is easily accessible, though it was distributed as part of a program that'd overwrite the floppy it was distributed on.
But it was sold in various ridiculously expensive collectors editions.
While the point of Agrippa is ostensibly the poem, the mechanism of delivery was very important to the appeal of it as well as the media attention (of course the fact that Gibson was well known by then was important), and you could imagine something similar for a demo. Add a hardware element, and packaging that forms part of the whole.
a) demoscene creators can get rich
b) "art investors" can launder their money