A brand new Flight Simulator X preview video has been released by Adam Szofran, the developer in charge of terrain generation and rendering on Flight Sim X. Adam recorded a video of the new terrain engine with a camera starting from the ground and going all up to space. You can clearly see the Earth's curvature from this new video! Aditionally, he released his GDC presentation in Word and Power Point formats - it contains loads of information about the Flight Simulator X development... definitely worth reading!

 Flight Simulator X - Preview Video: White-Clouds.org