not yet. right now ARKit feature points are not 'persistent'. Meaning, they are only really used to help track 3d space frame over frame (with the internal gyro). Getting a 3d map that can be shared with multiple people is another layer of complexity not yet integrated into ARKit

That's what I was hoping to see from the game demo during the keynote, but they didn't allude to it. That's the next key element we're going to need.