If you're talking about the shot at 4:54, that's not the final in-game look (unless perhaps that look is available for less powerful hardware in-game). That's just more like Google Maps "3D" (though he says bing, but I don't know where to find 3D on bing maps lol).
The more final trees look a hell of a lot better than Outerra's 2D billboards. But I still want to see closer shots, which somehow people on youtube who have the test builds have not done yet.
Is there an NDA for showing footage near the ground outside of airports? lol Or perhaps crashing your plane isn't a thing yet, lol.