I'll tell you what - people are starting to get confused because they're talking about back-end client and front-end server. The browser is getting to be a thicker and thicker client, and more and more decoupled from a server (or servers) that expose(s) a completely application-agnostic API to some object store (or stores.) People hit webpages that run applications on the client that allow it to interface with those object stores in some specific manner through APIs.

We might need a change in terminology.