The article is typical clickbait, with little content let alone nuanced analysis. For those looking for a quick technical overview of SLAM take a look at blog post (by now head of vision at Magic Leap)
http://www.computervisionblog.com/2016/01/why-slam-matters-f...
ARkit looks like a prelude to AR glasses. Where given the ability to control hardware specs, the advantage is not transferable.