Pokemon Go's AR is a gimmick, though, and doesn't work anywhere close to where you can claim it's mean to be serious. It's just so you can tell your friends "it shows you Pokemon in the room!".
Yeah it's not really AR, it's just turning the camera on and pasting an image over top of it. I'm not sure the app does any analysis of where the Pokemon is standing, I see them floating in midair all the time.
Technically I'd say it's not just the PokemonCamera (which everone has turned off except when they want to take a picture of a pokemon in a cool location). The game augments reality by providing a virtual layer that you can only see on the phone (poke stops, arenas, spawning of pokemon). Yeah it's not the shiny AR of projecting objects into the room but I'd argue it's augmentation regardless.
Is mapping a game over real-life not a form or AR? The normal game screen in Pokemon Go takes "the real world" (streets, locations) and augments it to make it part of the game.
I suppose it could be considered AR. But where do you draw the line? Is Google Maps with certain businesses outlined AR because it's an augmented version of the real world?
Personally I limit what I consider AR to be graphics superimposed on a real world view. With the maps in Pokemon GO, the real world and game are distinct, almost like VR.