I agree with your view, but if we put down our old greybeard hats for a minute - isn't it nice to see a new generation of people potentially getting excited about RSS? The parent comment is clearly by an optimistic youngster, who has just discovered an awesome technology that (he thinks) could change the world. And maybe it can! Just because we've seen it beaten once (well, a few times), it doesn't mean it's dead, and maybe, just maybe, there is something we can't see that will be the real RSS killer app.
Take podcasting - when RSS was first devised, nobody thought of such a use-case; it just happened that the media-attachment hacks tacked on top of it merged, at a particular time and place, with some other emerging tech (the iPod), creating something so good that it's still around.