Yes I agree lighting is very important, there was a huge jump in lighting from 360 to the one. But my point is during last gen things started shedding the things which made it so obvious it was a videogame.
Forgive the low res PS3 shot, if u can find a better one i will upload.
You see the trees in RDR2 look pretty convincing, so improving forests next gen will be more subtle, the leap was big from the 360 to the one because things still looked really fake, even lacking the geometry required.