Disconnecting those Buff Lightning connectors for the battery cable and strap arms is pretty easy and only requires a SIM eject tool. After that, disassembly is pretty standard for Apple hardware: heat gun, pry bar, screws everywhere, brackets and connectors.
Details of the EyeSight feature that displays a rendered version of the user's eyes have been discovered. A filter uses lenticular lenses and a film that creates a 3D effect, so viewers from the outside can see the correct image depending on their angle, even if it is not as bright after all the filtering.
In a tweet from iFixit CEO Kyle Wiens, you can see what the Vision Pro and that screen look like without the outer layers, the removal of which also exposes the exterior-mounted cameras and sensors. The video appears and disappears quite quickly. But there's more to come: iFixit says the headphones are too complicated for one video and promises a follow-up that shows “how deep this rabbit hole goes.”
Update February 3, 2024, 7:06 pm ET: Added iFixit X. disassembly post with an image of the extended pieces.