I realized a few days ago that AR is more for robots and automation than for humans.
Imagine a company supporting ar in there product for maintenance.
They need to describe there Maschine to a point that AR can create an overlay and a step by step guide.
If you do this so that your technician can do it so can a robot.
If we ever make the effort to export 3d models from things and make them available, I believe we will see ML extracting repair steps and robots executing them before humans walking around with AR gogles.
But I did use Google+ and it was just no one else really using those features.
So nope I'm not seeing the benefit of syncing my contacts with your service.
WhatsApp won in our family for sharing.