"lighter" is the revolutionary bit.
A huge impediment to VR uptake is having to go through the process of strapping a brick to one's face.
This isn't quite the "just putting on a pair of glasses" experience, but it's much closer to that than the former.
Its lighter form factor is more evolutionary than revolutionary. The AVP has some unnecessary extras such as the outward-facing display. If Apple wanted, it could make an Apple Vision Air with the latest A-series chip, a much lighter form factor and a much lower price - just like Meta VR Glasses.