In principle, this is roughly comparable with the approach Viture, XREAL, Nreal, etc. have taken. Each places a 1080p MicroOLED panel at the top of a prism that bounces the image into your eye, covering the top third of your vision. That's one of their main disadvantages and more than likely why neither Meta nor Apple utilize this tech, it really works best if you combine very tall nose bridges and then push it as far forward towards the nostriles as you can, in hopes of getting the top section with that prism roughly at eye level. Again, Brilliant Labs claim an incredibly wide-range of FOV and nearly full lens coverage from the center, not the top.
Also, the prisms used be the competition require far more phisical depth and the MicroOLED panels in those seem (very rough estimate using the exploded view rendering as a reference) two times larger in area size, so I have a hard time understanding how Brilliant Labs could manage such full screen coverage at such high quality, with such a thin "AR Lens" and what likely would be a lower resolution panel. In fact, the panel size looks incredibly close to the panel size in the render of their Monocle [1], which is 640x480 and projected using a similar prism solution into the lower third, not across the entire lens, which would be far more realistic and believable.
I'd be a bit more trusting if their images, representing what the display is supposed to look like, leaned towards the North Focal direction of very simple, low-res graphics. That would indicate a massive success in designing their lens solution and would make sense with a smaller MicroOLED panel. But high-resolution, full lens coverage using something fairly slim; that's a lot of sudden innovation that may deserve a more in-depth presentation, ideally with some independent journalists to verify.
Again, I'm mainly skeptical because I'd really love for this to be real.
[1] https://docs.brilliant.xyz/monocle/images/monocle-exploded-v...