Awful, egregriously bad article. Beyond wanting to tear my hair out from the prose itself, it doesn't provide any proof to support its central thesis. "The frenzied days of web 2.0 are over", "others believe this technology is on its way out." Citation, please? If you just pull something out of your ass, say so; otherwise provide some evidence for your conclusion. Is it worth pointing out that the principal reason the author gives for AJAX being on the "way out" is that developers misuse it? Boy, that sure hasn't stopped HTML, Flash, Javascript, CSS...
http://simonwillison.net/2007/Aug/15/jquery/