Quixel is a company that sells textures and other assets (similar to the way games like Battlefront are able to achieve almost photo-realistic visuals). Thatās amazing work for the present, but the future is obviously going to look even better.
https://kotaku.com/how-star-wars-battlefronts-beautiful-levels-were-made-1782646679
Rebirth is a short film made by Quixel that shows where weāre at in 2019. Itās āa real-time cinematicā running in Unreal Engine 4, and while itās just an animation and not something playable, it is using technology that games today are using, so playing something looking like this might not be that far off into the future.
If you think the landscape looks like Iceland, thatās because it is, in a roundabout kinda way. The natural environment here is comprised of enormous scans of actual Icelandic terrain.