Ok, but still, I'm not sure the "put it to shame" really is true. The iPhone still has one of the best screens out there. The higher pixel density on competing phones doesn't actually help anyone. What might be desirable for some is physically bigger screens, but you don't need a higher pixel density for that.
More important (besides size) are the other characteristics of the screen as outlined earlier, and Brian Klug seems to think that Apple has amongst the best calibration in the industry for its screens, at least for a mass produced product.
To put it another way, I think realistically the main criticism for Apple's screens should at this point be size. I personally prefer 4.0-4.3" screens in phones (and find my 4.7" Android phone too big), but obviously, other people prefer bigger. But pixel density for iPhones is a complete non-issue.