No one is really responding to your question:
> Is there any evidence Apple has any advantage over the already quite competent, well-funded players who have already demonstrated significant progress in this area?
Yes. They obviously have world-class expertise in miniaturization, which is the key challenge for augmented reality glasses.
They also just released last year their AirPods, which have a custom chip for delivering low latency wireless streams of audio. Video or light field is the next step, but AirPods are on the market which means Apple already has an MVP out. That's a huge advantage.
The other key missing piece for any kind of mobile AR or VR is inside-out tracking. That, again, requires custom low-power silicon which is very much a strength for Apple. Compared to Google, Oculus, HTC, or any of the startups, Apple has much more experience with custom silicon. They acquired Metaio and Flyby, which build their machine vision base.