https://www.pcgamer.com/this-unity-tech-demo-shows-the-potential-future-of-open-world-games/

Last week, Unity held its annual developer convention “Unite” in Los Angeles, where it showed off a new plan to rebuild its wildly popular engine from its core foundations. This includes the introduction of multiple new updates and work-in-progress technologies. One of these reveals was essentially a glimpse into the future of what open world games might look like. 

Dubbed the Entity Component System (ECS for short), Unity describes it as “a way of writing code that focuses on the actual problems you are solving: the data and behaviour that make up your game.” Unity claims this "data-oriented" system lets developers iterate on their designs much more efficiently than using the current, object-oriented system.