Without revisiting the presentation, OpticID, greater-than-4k OLED displays for each eye, 3D digital persona scanning for video conferencing, external curved OLED display to show the wearer's eyes, and to easily communicate when the wearer can and cannot see people surrounding them, automatic detection if someone is near them and automatically phase that person into their display so they can see them while doing other activities, a super high-end M2/R1 chip built in, unrivaled build quality, an entire Apple quality OS built into taking advantage of the device within the Apple ecosystem from top to bottom, extremely high fidelity augmented reality, including 3D navigable photos and videos.
That's just off the top of my head, but I'm sure I'm missing a bunch.
Like, the Valve Index isn't even remotely comparable to what this device is attempting to achieve. That kind of talk reminds me of Steve Ballmer talking about the Windows Mobile & the Motorola Q when the iPhone was introduced.
I still personally think that AR/VR has a very niche consumer appeal, regardless of how well it works or how many feature it offers, but Apple is clearly going for something that no one has ever attempted thus far.