the visual specs look fantastic, however I wouldn't get too excited by the apparent lightness of it.
No built-in cameras, No built-in processing, assume that the tether supplies power so no battery.
I see the link to the AIO version says weight 380g (main body). Dunno if that means they are excluding the headstrap and/or the battery, which is on the rear of the head strap.
Oculus 2 is 530grams with the basic head strap, although @3600, the battery is significantly smaller capacity that that claimed for the AIO version.