> WWW solved an entirely different problem, namely distribution and communication.

> JS et. al. solved the problem of responsiveness and interaction ie. latency.

I don't think either of these statements is correct. There wasn't a problem of 'responsiveness' and 'interaction' on http to begin with, in fact what Sun and Netscape did with javascript was to overengineer the web because they saw it as a business opportunity to add client-side code. http was designed (badly) to exchange hypertext documents, not to perform transactions over the server, or render video-games, or play music and videos, and certainly not to transfer files, for the latter ftp was desgined (also badly).