At that point I will be able to have the fun of AR (gaming with paper toys or other papercrafts, displaying characters on a table for my tabletop RPG group, getting directions in a foreign city, identifying plants and insects just by looking at them, seeing where my cats are located through walls via their airtag collars) without any ads, without any data harvesting nor privacy concerns, and even being able to write my own custom apps or firmware mods. It will still be a toy rather than a necessary part of life like a smartphone has become but a fun toy nonetheless.