The X27 in the link is a high-ISO (5'000'000) digital system, so it may have lag that could effect people who are wearing it (e.g., motion sickness). The goggl

The X27 in the link is a high-ISO (5'000'000) digital system, so it may have lag that could effect people who are wearing it (e.g., motion sickness). The goggles you see folks wearing on their heads is analog amplification, so has zero lag. There are use-cases for both.