I'm expecting these visuals next gen tbh.
You might get a game with this, but don't count on many games pulling this off.
A. these things are very dependent on pipeline and artist ability, not all studios are made equal.
This guy has incredible experience working with photogrammetry assets, something even naughty dog isn't doing.
B. Getting this kind of fidelity up is incredibly expensive. even working with packs like quixel, those packs simply don't cover the amount needed for a full game.
C. All of this might run real time, but this is without any game code at all. Adding things like AI, physics, game logic, etc. kills performance drastically
Combine this with these demos being very large in size, which is why a lot of these cool movies of guys making cool scenes in UE4 is something that is possible real time, but you wont see for a while in an actual full game
also what you see there is rendered in engine in UE4, but there is no info to what the frame rate this runs realtime and at what resolution, so that is on PC with a beefy card most likely, and is as I said before without any game code stealing performance underneath. and no the video is not representative to real time, its a trailer made in the UE4 sequence editor and exported via the High Quality Media Export which then renders either frames or full video at whatever setting you like in high quality.