I think you make good points - social and collaborative activities are where AR will do best. Integrating real world and virtual content could also be huge, though not necessarily the way you described. Overlaying sports data in a sporting event setting is a very late case and unlikely to be developed until the technology is incredibly mature. But overlaying GPS directions or creating beacons and other constructs in real space could be huge if the tech gets just a little more practical.

Also Pokémon Go plays just as well if you turn off AR. It’s mostly a gimmick in my opinion. But other AR gaming examples do exist.