At the VGA awards moments ago, the latest Forza game was announced. Forza Notorsports 4 will be out in Fall 2011, and, judging from the video shown, will feature the realistic racing action you'd expect from the next Forza.
There aren't any other details available right now, but you can bet we'll tell you more when we know more. By the way, the photo above is from Forza 3. We'll swap it out with a shot from the new game, as soon as we can, I promise.