What is really valuable about these experiments is that they provide some novel and creative ways to do stuff. Consider "Plink by DinahMoe". This deceptively simple browser app uses the W3C's Web Audio API and NODE.js to create a multi-user music generating environment.
While basic audio file playback and control are supported, the Web Audio API also has a huge range of sophisticated capabilities such as "Convolution Effects" which is "is the imposition of a spectral or rhythmic structure on a sound" (for example, taking an audio sample and adding echo or reversing the playback are forms of convolution).
The NODE.js site goes on to explain that the subsystem "uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices."