Interactive demo-like things have been taking off lately, but mostly under the label "games" (which sells more), even in the case where the game-ness is pretty minimal. Not sure if they're explicitly inspired by the demoscene or not, but interactive-procedural-graphics-and-sound stuff like Proteus feels very much like a demoscene production to me (http://www.visitproteus.com/). Main difference imo is more focus on the procedural interactivity from an experiential perspective, and less focus on technical virtuosity.