I get your points for the category of software you are referring to, however I am pretty sure that there will be a common understanding round the subject of "real-time web" and from my point of view I dont see how that can in any way interfere or make things harder for people writing real-time software using non-web-tech. I find it unlikely that the big web developer community will use a new terminology to describe what they are building in order to please the old-school real-time developers.