Everything is 2D, making it just a TV/phone on your face. Although these other products were never released commercially, the google glasses and microsoft's hololens both envisioned adding 3D objects that interacted with your real space. In comparison, the Vision is very dull. I'm glad they are actually selling commercially though, so maybe we can soon see these features that AR allows, from them or competitors.
HoloLens was commercially released in 2016 and its successor, the HoloLens 2 in 2019, the latter of which is still available.
And the Google Glass (not 'glasses') would not have allowed 3D in any true sense as it lacked the capability to calculate the user's head pose in space, necessary for 3- or 6-DoF tracking. It was essentially a heads up display attached to your face.