ARKit what these guys are talking about isn't even that. Its just holding up your phone. This functionality has been around forever. From Worldlens, to Yelp to the Ikea app. I don't know why all of the sudden its considered "Around the corner"
Because at the end of the Summer hundreds of millions of users will upgrade to an OS that has the ARKit API built in and developers will have a standard solution that works well. That's with the hardware out now, enhanced AR friendly sensors will probably start shipping on the new iPhone and then in subsequent model years it's anyone's guess.