looking at this image, seems they should focus more on helicopter itself. While terrain looks nice, helicopter is perfectly "new", clean, more like toy, then helicopter. It destroys whole demo visually. Every detail displayed on screen counts...
After using both Unity and Unigine, I find that Unigine based Games seem to run better on my Linux computers. Oil Rush looks pretty darn nice too, I think. I can't wait to see more Games using Unigine personally.
As it stands now, Intel have best "their" OpenGL vs "their" DirectX performance. Its almost equal for DX11 vs OGL 4.0 ! (On Win ofc.)
So given a bit of time, and Apple development time*, we will see better performance out of binary blobs on Linux. (MESA folks alweys cook some perf improvements...)
* Since as for now OSX have bigger share of gaming market then Linux. Right now AMD+Nvidia have not real reason for caring about OGL4+ perf.
The thing is when you are using a higher end solution you will either be stuck with AMD or with Nvidea so really for any serious gamer this would still form a problem. Last time I checked open gl just gave me 19fps on the valley benchmark where the direct x11 one gave me 45.