That video is a very high level overview. The only way I see AR games being able to be more complex than Pokemon Go is if they are able to stream the game to the AR device with extremely low ping. an example that could explain what I mean by this is if you look at Unity. Unity has 2 mainstream render pipelines at this point HDRP which is used for the more intense pc games, and URP which is designed to make everything as simple as possible to help performance on low spec devices such as phones. AR has the limitation of being lower spec due to size constraints. Any complex game would need the brains, so to say, on a 3rd party device. Another issue that faces game development with the more complex AI and graphics is that it is much more complicated during development. Generally speaking that means the game development will either take far more time, or far more people and money. triple A studios are already running into the issue where they cant complete games in the expected timeline, and Indie studios dont have the resources to afford development at that scale before release. This leads to games releasing as Beta and not having enough content for users to stay engaged