The terrain looks great, also I like the flying over it and the text labels. On the downside, I must say the overall impression is a little spoiled by amateurish models and lack of details. I would not show this demo outside this forum in its current unfinished state. But I think with a little effort it could become a great demo.

Some suggestions, above all add a detail map to the terrain, or better use the multitexture shader for different detail maps for snow, rock and so on. Activate shadows for moving models. Let the helicopter rotor blade rotate a little more realistic. Throw out that girl in the red dress and replace it by a more professional looking model with higher resolution and better animation.