AR Glasses -- 5 years to mainstream

"Mainstream" is a significant term, and I don't think this is the kind of guy who will misuse it. Personal computers were well known for about 15 years before you could call them "MainStream."

Engadget

AR’s Future is Glasses, Not Phones, Says Niantic CEO

WALL STREET JOURNAL

John Hanke expects it will take about five years before the technology is mainstream

By

Betsy Morris

Oct. 17, 2017 2:59 p.m. ET

LAGUNA BEACH, Calif.—The future platform of augmented reality will be on glasses, not smartphones, says John Hanke, chief executive of Niantic Inc., developer of the hit AR game, Pokémon Go.