Google Glass was also only very primitive AR in that there was no scene understanding capabilities. There was no ability for the system to convincingly augment the real world (for example, using plane detection to anchor digital entities to real world geometry). It was purely a small, low resolution, monocular, semi-transparent display providing essentially smart watch level functionality in a face-worn form factor. It was a cool but unsuccessful idea that was ahead of its time.

TL;DR: I agree; don't use Glass as a reason to write off AR glasses altogether.