There are also animations for the death throes of your enemies - instead of instantly collapsing, they flounder on the floor, clutch their stomachs, or else crawl away from the battle before finally perishing. The world of Age of Empires IV is gorgeous to look at, but I think it’s those extra details which really sell it - the way the outline of the building fills in as it’s constructed, the gradual destruction and resulting collapse of buildings and walls as they’re attacked it all serves to add another layer of immersion to an already immersive game.
The first thing I noticed was the level of detail.