The second part is for HMD makers to prioritise good eye-relief adjustment above IAD adjustment
Going from a CV1 to a RiftS, I agree with this. For me the Eye Relief is more important than the manual IPD adjuster. If wearing contacts I can bring the display as close as comfortably possible, but if wearing glasses I can ease up 1 or 2 increments to allow enough space for them. But of course, having both adjustments would be the best scenario.
The forth part is that many headsets now have well-calibrated cameras on the headsets for positional sensing and for passthrough video. I would love to allow the user to hold the HMD in front of their face "looking" at them, the user looks at a spot on the HMD, it then takes a picture of their face, figures out their actual IPD (with the appropriate vergence because they know the user is looking at the point on the HMD), calculates the IOD, and then puts that in the biometric profile. This is a more convenient alternative to going to the optometrist.
Funny enough, PSVR does something like this. They have a IPD measure tool that takes your picture using the PSVR camera, you then use that photo to measure the distance between your pupils (on screen), and PSVR then uses that number to set the software based IPD.
Going from a CV1 to a RiftS, I agree with this. For me the Eye Relief is more important than the manual IPD adjuster. If wearing contacts I can bring the display as close as comfortably possible, but if wearing glasses I can ease up 1 or 2 increments to allow enough space for them. But of course, having both adjustments would be the best scenario.
Funny enough, PSVR does something like this. They have a IPD measure tool that takes your picture using the PSVR camera, you then use that photo to measure the distance between your pupils (on screen), and PSVR then uses that number to set the software based IPD.