Even the biolab one could be both natural and man made: the virus was found and isolated by biologists studying local bat populations. They then failed to contain it properly (remember how surprised everyone was when they realized how contagious it was over the air?) and it started spreading.
Yeah, it’s the use case. Qualcomm had smartphones in the 80s, General Magic had the smartphone in the 90s, but it took more than another decade to actually combine phone and browser into the right form factor and fast enough mobile connection and a world wide web to make it work.
For AR there were moments too. Niantic with global positioning, 5G with fast mobile internet, but that was not enough.
Input method isn’t clear yet (Apple may have solved it with gaze-pinch), form factor not consumer market ready. Actual use case that is worth the price point? Nah