Well, after a few years of hopeful concept drawings by various magazines/websites and swirling rumors of its impending release that always ended up in disappointment at the year-end bike shows, Honda finally unveiled the street-going replica of its all-conquering RC213V MotoGP racebike at the EICMA show in Milan, Italy. Dubbed the "RC213V-S Prototype", the bikes that were on display literally appear at first glance to be the MotoGP bike with lights and mirrors tacked on (as a matter of fact, the bike is labeled an "exhibition model" in official Honda Japan press releases). But a closer look reveals that there was some definite production-scale work going on with the prototype.
For example, the massive radiators are not the custom race units commonly found on the factory racebikes, but are production pieces with stouter end tanks. This allows easy installation of brackets for the cooling fans installed on both sides of the radiators for slow-going in traffic. The coolant overflow catch tank (another street-going production item) looks to have been made specifically for the bike, and the right side of the engine shows that a wet clutch cover replaces the dry clutch mounted externally on MotoGP bike. The exhaust also shows some production build, with one "Y" connector pipe visible from the rear showing its pressed stainless steel origins, and the exhaust tips have silencer cans with a smaller opening.
Unfortunately Honda did not provide any technical details on the RC213V-S prototype, so it's likely we'll have to wait until next year before any specs are revealed.