Hi all, Apologies in advance for the long post. Currently I have an Early 2013 15" Retina MacBook Pro. 95% of the time it's connected to an external monitor (which is either a Thunderbolt Display or a 20" Samsung 206BW). A few weeks ago I was using my laptop's display for several hours at a time. After this I noticed that I began to feel extremely ill (i.e. headache, nausea). I have now concluded that I can use the Retina display for short time periods, but I'm definitely noticing that longer sessions make me ill. I do have an iPhone 5 and this doesn't make me ill, so I'm assuming it has something to do with the size of the screen. I am looking at purchasing a 13" MacBook Air (i7, 8GB, 512GB SSD) as it isn't always possible for me to use an external display. Although I understand that this model may be End-of-Life soon, the ironic thing is I wouldn't want a Retina display in this case. I also have a certain Windows application that doesn't scale to the Retina display properly, and so this is another reason for wanting the non-Retina display. The only thing I am concerned about is other updates (i.e. CPU, design). Is it safe to assume that this model won't receive any further incremental updates for at least 6 months? What I'm also wondering is how the MacBook Air's display compares to the external monitors I have been using. I've seen that the Thunderbolt Display PPI is ~109 and the PPI for the Samsung monitor is ~99 PPI, so I am hoping I will be satisfied with the Air's 128 PPI? (from http://dpi.lv/ and https://www.sven.de/dpi/) I have used the Air's screen for a few minutes in-store, but I didn't really get a good indication of how it compares to my other screens. I'm hoping someone will be able to assist me here. Thanks very much.