Apple also probably just has about as much brand permission as anyone to create a new category of consumer device and shepherd it through the first couple of versions that will doubtless have shortcomings.
There are a lot of challenges to get glasses right--both from a hardware and a usability/acceptability perspective. But people are already used to using their phones for things so it seems a very natural transition.
On the other hand, that would clearly be a step beyond today's smartphones to, as you suggest, potentially always on video and audio that's constantly communicating with and being analyzed by databases.
By contrast, VR seems to me to be a niche.
ever have someone come up to you and say "Oh your the person who x"
just a thought on your last sentence