IGN has shared a new video, comparing the real-life Britain locations with the recreated in-game ones that will be featured in Forza Horizon 4. This video will give you an idea of how close to the real thing Forza Horizon 4 comes.
Forza Horizon 4 will feature dynamic day/night cycles and seasons (and seasons promise to have a big impact on the gameplay as they will affect the way vehicles handle). The game will also feature a shared open world, meaning that other drivers you see in the world are other players.
Forza Horizon 4 will feature over over 450 cars, will support cross-play between Xbox and Windows 10, will feature a simplified chat system, and is currently scheduled for an October 2nd release.