Steam now offers MotoGP 13, a day before Milestone's motorcycle racing sequel was expected (Adobe Acrobat format). A playable demo was released already, and here's word on the game:

2013 Riders, teams and tracks; both simulation and accessible bike handling with scalable aids; photorealistic graphics with TV style interface; ingame voice over by official MotoGP™ commentators; first person elements such as the helmet view and 3D pits to put you in the rider’s shoes. This is MotoGP™13, the official MotoGP™ videogame: try Career Mode, rising from a Moto3™ wildcard to the MotoGP™ World Champion, or challenge your friends in Split Screen or Online Championship.