I am considering a move from my cMBP 13" to a MBA 13" because of the weight differential, and for the additional resolution (I would highly prefer not having to buy an external monitor if possible). Another, smaller reason why I was considering the change was because my eyes don't like staring at the cMBP's screen for prolonged periods of time, especially when I'm reading a lot of text. I was under the impression that the MBAs offered higher PPI, which would make text sharper, and thus easier on the eyes, but after some research, I've found that the difference in PPI between the cMBP and the MBA is minimal (around 20ish?) compared to the (obviously) dramatic jump to retina. I don't really care about "blacks" or color gamuts (unless these things affect readability of text over prolonged periods of time, do they?), but for those who have used both screens extensively, is there a noticeable difference between the two screens? Is the MBA easier on the eyes by a material amount? If this isn' the case, then I'll probably just have to buy an external monitor until Apple releases a retina revision that is to my liking... Thanks for any insight ahead of time.