Havent played Robocop, but Lords Of The Fallen uses nanite for umbral meshes. Since there are no low-detail versions, what happens is whole chunks of surface detail and geometry spawn and despawn in front of you. The end result looks much worse than what you'd expect with LOD swaps in UE4. Not up to me to judge whether this is due to horsepower or badly optimized code, and I hope we will see nanite and similar tech eventually rise to its potential.