dikbozo :
This is somewhat like Philip K. Dick saw for the future of advertising back in the 60's with tailored ads streamed into the eyes of people passing through public spaces. The ad platform is ultimately Zuckerberg's raison d'etre for this 'technology'.
I'll play devil's advocate.
I think his
main objective is to make Facebook more immersive, pervasive, and engaging. What if he doesn't like the way that FB currently isolates people and confines them to their homes or wherever they can sit down and get sucked into their phone screen? What if he genuinely wants people to get out more?
Better & more ways to deliver ads are merely a side-benefit. And that's not the only one. AR also provides new ways to gather information about people, and new ways to market FB's services to local businesses, tourism, etc.
In any case, we should keep in perspective that he spent over $2B of investors' money on buying Oculus. Eventually, he's got to try to make this stuff pay off.