Now that I have your attention, it’s not Ajax that will die, it’s the term that will.
More importantly, we now see Ajax as an architecture. From defining a page for every functionality, we now think in terms of small requests to the server and manipulating parts of the page, instead of changing the whole page. And all the requests and updates happen in the background, with little user intervention. As I compose this post using Gmail, it is continually saving it while at the same time checking on the status of people in my contact list.
In a few years, the Ajax architecture will become the web architecture and everyone would expect that this is just how the web works.
Die “Ajax”! Die!