Billions are spend right now to make sure the glasses also run Android or iOS. So far, Google, Samsung, Magic Leap, RealWear and Vuzix are working with/on Android XR, and obliviously Apple is working on AR/VR iOS.
Meta and a couple of smaller startups are doing something in-house, but I don't give them much chances to get an ecosystem going.
Rolling the dice on a new technology could wind up being much more favorable.