Some info and screenshots Glitchwerks posted on GFAQs:
I was iffy about it at first, but dayom. I'm sold.
Glitchwerks wrote:
http://www.forzacentral.com/forum/content/318-forza-horizon-new-batch-screenshots.html
...
http://www.forzaplanet.net/more-forza-horizon-details-gas-stations-dynamic-daynight-cycles-desert-heat/
Forza Motorsport 4 physics optimized for off-road.
65 terrain types ranging from mud and gravel to grass and asphalt.
Will feature a dynamic day/night cycle.
Takes place in Colorado.
Will contain gas stations, paint shops, car dealerships, and of course, racing events.
I was iffy about it at first, but dayom. I'm sold.