In that 20 years the hardware and software exponentially grew in capacity and decreased greatly in cost. Computers turned into something you’d want in your pocket once they could be unobtrusive enough to be tolerable with you all day.

On that note, who knows what would AR require in order to take off. It probably needs to be something you can get 80% of the killer features without wearing glasses. It also needs to support whatever frames glass wearers want to wear. It might require actual visual implants as I don’t think there’s a way to turn a contact lens into a display.