And contact lenses and lasik are popular because many don’t want to wear glasses. I see head mounted displays useful in constrained scenarios (e.g construction site and tasks where you already wear safety glasses and need free hands). I have a harder time seeing a world where people ditch phones and start voluntarily wearing glasses which is often uncomfortable and inconvenient. Just finished 5 miles run on treadmill, went to sauna and did bouldering. There’s no room for glasses but can occasionally check my phone.