People who spend $3500 on a headset are industrial/professional users who will make more than $3500 in value for it. That is why Microsoft HoloLens, and a lot of commercial AR products you've never heard of, cost even more.
The brand + price tag is enough to sell at least a few thousand Vision units regardless of technical specifications.
[0] it's enough for enterprise sales, but they're charging much much more than $3500 one time.