AR has a huge battery life and size problem. The amount of video processing that thing would need to do to be useful, would result in an enormous device with an hour or two of battery life. Rendering it useless for any real world consumer application.

On top of that it has a gigantic privacy and surveillance problem.

And if that wouldn't be enough, what the heck are you going to do with it? Everything an AR headset could do, you can do today with your phone already. There is very little need to wear that functionality on your head all the time.

For some rare business use cases it can make sense, that's why Microsoft Hololens is still around, but even they struggle to finding any areas where it makes it past the "nice idea" stage and actually into a working product.