First world problem, man. Important only to the performance obsessed. Most developers concerned about this have too much time and not enough commercial imperative.
As we move intelligence to the client, we're starting to use a lot of data queries which were never meant for the wire. (Particularly in IT applications.)
Having a way to filter in those cases would save having to write & maintain a whole new CRUD layer. In the long run, it could even lead to more efficient queries when objects are composed of many records.
