There is a post sometime in the last year here about a Microsoft Research tech demo which abused bandwidth to send all possible futures as well as the current screen, enabling client-side prediction to again eat one way of the trip.
This is the relevant technical details from the pcmag article:
Microsoft's DeLorean system takes a look at what a player is doing at any given point and extrapolates all the possible movements. It streams a rendering of these from a server to a player's console. Thus, when a player decides what he or she plans to do, that scene—for a lack of a better way to phrase it—is already ready to go.
