Totally agree with your points
It was definitly presence I experienced. It is a very specific sensation that cannot be easily described. It's not unlike a lucid dream. In the scenes above, they each invoked presence whether I moved or stayed still - and that is mainly down to how well crafted those environments are. There are a number of geometric similarities in those images above...lots of straight lines and grids. The sense of presence in these scenes wasn't fleeting for me, but extremely strong - and long lasting. It convinced me beyond any doubt that VR is the future. (Also raises a lot of questions about how we each subjectively view reality).
I also agree that how real the scene is - doesn't have much to do with presence. I also have experienced it in cartoon demos and environments of simple geometry such as a plane to stand on and a few cubes.
The point I was trying to make was that Abrash has also said a few times that different people have different requirements which induce presence. Some people achieve it at a much lower threshold. That said - I assume Oculus are aiming at specifications that induce it in the widest range of people possible - which forms the basis of those requirements they list.
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