[davidcollantes]

Macbook Pro (retina): 2560x1600 at 227 pixels per inch.

1080p: 1920x1080 (assuming 16:9)

Really can't compare. I do not mean I have seen all, but no display I have seen (on notebooks) gets near Apple's "retina display." None. Google is trying with the Pixel.

[recoiledsnake]

You left out the DPI number for the 11" 1080p display.

Let me try:

Retina iPad: 264 PPI

13" Retina Macbook Pro: 227 PPI

10.6" Surface Pro: 208 PPI

11" Vaio Duo 11: 190 PPI

There is a difference but it is minor and I disagree with your statements you can't compare or that it doesn't even "get near". You'll be hitting the point of diminishing returns.