It seems that Unity reach a strong amount of realism in this demo :
Shaders and post processing improved.
News about graphic engine and multhreading performance increase:
C# Job System - A New Coding System That Unlocks Major Performance Increases - The C# Job System is a new high-performance multithreaded system that makes it possible to take advantage of multi-core processors without the heavy programming headache. Combined with a new programming model (Entity Component System), it enables developers to optimize creations for major increases in performance. Developers can add more effects and complexity to their games, or use that horsepower to add complex AI, to make rich worlds that immerse gamers.
It seems that the technology behind nitro engine (ashes of singularity) is now matched in unity 2018 engine.
A 32000 (up to 100 000 !) units fight and fast zoom level. Who can say unity is not suited for a supcom engine remake ?