Werner likens REST to physics, in that each is a model of some reality, not the reality itself. He writes;
Whether we use the REST model, or another model to be developed that appears to match it closer or from a different perspective, “the web” and other large scale distributed systems will continue to do “their thing”, whatever model we put on it. The distributed, decentralized, bottom-up, autonomous nature of the web, exhibits complex organic interactions, that are not driven by models or laws, just as that Nature is not driven by the laws of Physics.
I would just add though, that there’s also a “metamodel” in play here that shapes our models; software architecture (and while Roy’s view is just one of several, the other views aren’t that different). Of course, this too is a model, and so falls under the domain of the same principle. But I suggest that that so long as this metamodel remains useful, most models of the architecture of the best behaved parts of a future Web, will be REST extensions, like ARRESTED or the (bulk of) the Semantic Web.