JavaScript switched on?

Jeremy Keith argues that an Ajax application should also work if JavaScript is switched off in the browser. I think this approach will not unlock the true value of Ajax applications. In the more advanced Ajax applications business logic will partly move to the client: this is similar to how client-server applications compare to mainframe applications. For simple form validation, search queries and the like it does make sense to have a non-JavaScript version. For applications where not every mouse-click is communicated to the server and client-side logic is executed, it might be very difficult to build a non-JavaScript equivalent. I believe the browser is capable of more than just displaying static pages with a little bit of interaction: the browser is a complete software development platform. There are even people who have created a complete execution stack, with its own command prompt.