Just as Facebook’s video ad business begins to approach its first plateau (well hardly a plateau, given that it came out with revenues up 51% this week), artificial intelligence (AI) and augmented reality (AR) are coming together nicely for the company’s next venture in social advertising. Facebook has revealed a slew of new projects it’s been working on that’ll position the social network to take targeted advertising to a whole new level. AR today is all about the smartphone – take Pokemon Go or Snapchat, for example – and so too is Facebook. The company is hoping to capitalize on a few trends that are beginning to intersect at the smartphone: AR technology, AI computing, and the growing importance of…