Marginal & unnecessary updates imho... Ugly coloured ones as well (intentionally chosen to drive some undecided customers for the iPhone Air).
I'm quite happy with my (silver) 17 Pro's authentic colour rendition of 1x & 4x units, as well as resolution even though images may need some extra clarity & sharpening in post. I shoot at 48 mpx JPG, later downres to 20-24 mpx and apply smart sharpen (amount: 20, radius: 1.2) to reveal hidden details without exaggerating.
Btw, iPhone needs to update the mediocre-quality ultrawide optics asap.