No, predictive software is only one of many applications - but any reasonably compelling application for AR glasses would involve a tremendous amount of contextual and user-specific information, and Apple is horribly bad at it, while Google is very good at it. Facebook is the only other (major, giant) company that has shown themselves to be capable of this kind of "smart" software.

Google is good at it by our current low standards. There's a lot of room for improvement in the area, and that could come from many companies, known and unknown.

There's fewer affordances for interaction, yet the screen is always visible. Huge win if the software guess correctly that you want to see something, potentially quite annoying if not. I've never used a Glass though, this is just based on watching videos of it.