Just to inform. Implementing advanced graphics inside a game is not just done by 3 clicks and applying a new DX12 patch. These things require work, CPU/GPU power, and probably a lot of money aswell.
The footage in the video you posted looks high-tech indeed, and seems to have potential for future gaming.
But I doubt they create this for charity. I would not blame it on V-step for not using it. Because since this video comes from 2010, why did no other game use this already?
I believe I read a similar discussion once a while ago. The screenshots were indeed taken ingame with some photoshop applied to it. (like the bow wake) But to be fair, I remember other games showing pre-gameplay screenshots which also looked (far)better than the end result. Mafia 2, Hitman absolution, GTA IV, just to name a few. It may be misleading indeed, but it's certainly not uncommon.