At 27", I don't think it is. You can think about pixel size and then how many pixels are on the screen, as screen sizes get larger, so do pixels. On a 27" 1080p monitor, are you really looking at the pixels and thinking they are too large? How about 4k? We barely touched the surface of 4k at 27" and then we go and squeeze an extra 40% more pixels into the same size. I'd say at 50"+ screen maybe that would be noticeable, but at 27"?

Also, what content is going to be made for 5k? We're just getting 1080p and 4k is on the horizon. Will media companies jump to Apple's 5k? How good are website images going to look (depends on dpi I suppose), but that's a lot of pixels.

Then comes what I find the strangest part. Yesterday there was a question on Quora about why Apple only has an 8megapixel camera in the iPhone. http://www.quora.com/Why-did-Apple-use-an-8-megapixel-camera... almost all the comments say "pixels don't matter", and on 1080p monitors, I'd tend to agree with them.

But now you've got photos with essentially a 4k resolution, and everybody jumping up and down that pixels don't count. Then today, we have all this talk about how the new iMac has so many pixels on the screen and how great that is. So which is it? Pixels don't count, or pixels do count? How can they not count on capture, but count on presentation (I would accept that the reverse could be true).