I think you've unwittingly asked for DDP and Meteor. Meteor was seriously ahead of its time, much like all good systems that suffered under their complexity be

I think you've unwittingly asked for DDP and Meteor. Meteor was seriously ahead of its time, much like all good systems that suffered under their complexity before the infrastructure was there to support it. At its core, its a websocket-based RPC protocol that could return database cursors, with asynchronous downloading of database documents. The client ran a miniature instance of MongoDB inside the browser, which enabled clients to issue normal MongoDB queries client-side with optimistic evaluation. Data updates would hit the local mongo instance, be optimistically rendered, and then be sent to the server. Then the source-of-truth would be delivered back to the client via the mongodb oplog. In other words, it's bi-directional mongodb oplog streaming. Absolutely fantastic considering it was released in 2012.