There's a lot to unpack here. Firstly, "8K per eye" usually means less than what we usually think of for TVs, since each eye gets a nearly square display. I HIGHLY doubt that this will have two 8K X 8K displays! Next, they claim its using active "foveated rendering liberally use an already-known VR technique", except nobody has been able to actually pull this off yet. Even Carmack has recently had his doubts. I'd love to see this happen, though!
Lastly, $3K+ is an enterprise device price point, just as it is for Hololens 2. Hololens 2 OTOH, has found its niche in the design/engineering and surgical workplace. I could see the same for this type of device, but I also really think that a consumer Hololens (<$1K) has a strong chance of being just as close to market as this niche device.
Lastly AR/VR is without a doubt, our future. It represents the 3rd wave of computing, and is just a matter of time. There is a reason that Microsoft, Facebook, and Apple are going big in this sector. I say, LET Apple enter this emerging field! It'll only benefit the other players. Any device considerably over $1K though, is not going to be a mainstream success. It could however, push more interest in a $300 device in the meantime.