[arianestrasse]

When you're that high, the individual waves and currents are simply not that visible. What you see on the video IS how it actually looks in real life.

As always, whenever you find yourself saying something along the lines "I'm surprised they haven't thought of it...", the odds are they actually have thought about it and that you're wrong. After all, it would be comical for Microsoft to spend so much on dynamic, volumetric clouds and then just throw in the "fluid simulation engine" a.k.a. static textures from Flight Simulator 98.