There is already a standard called JSON RPC and it is not RESTful at all. RESTful means you are using HTTP verbs to convey some information. This is a “mostly stupid” idea, but it has caught on. RESTful is an now industry buzzword. So this is what the pragmatics implement.
We may as well have a debate on what object oriented really means before implementing something, but again, the pragmatic will just create a structure that is broadly recognizable as object oriented.