Depending on how you define AR, they've added a number of features to Pokémon GO over the years (ability to place Pokémon into the world and view them with your phone's camera, real-time in-game weather based on your location, and realistic sky graphics with everything from sunsets to accurate star constellations).

But the common complaint I hear from players is that they don't really care about those developments since the AR additions haven't really altered the basic game play loop.

They bought out a couple companies who made major leaps, 6D.ai for example.