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.

"This is what the night sky would look like here if you didn't live within 100 miles of a pokestop."

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