While watching the presentation, I found the faces a bit too sharp, but I was watching on a different, newer screen, which I imagined had a higher pixel density

While watching the presentation, I found the faces a bit too sharp, but I was watching on a different, newer screen, which I imagined had a higher pixel density than the one I'm used to everyday. But I just checked and the difference is neglectable (224 vs 218 ppi), so my guess is the over-sharpening of the iPhone. Not that it was bad, just different enough to be noticeable.