Is a newspaper full of what's new, or is it news because it's in the paper?
Most of the front-page articles on HN are not news, they are recycled anti-business school puff pieces. And yet, this is Hacker News.
If Google releases a product that looks suspiciously like Apple's failed OpenDoc initiative from, oh, 12 years ago, that's news. If they're focusing on a communication medium style that totally existed before, but which was largely abandoned because it was incredibly annoying, that's news, too. Those who don't learn, doomed repeat, etc., etc.