One of my main reasons for wanting an iPad is to put all of my hundreds of scientific journal articles on it, and dispense with my old practice of printing hard-copies to read. There are a lot of things I want out of a PDF reader for iPad (highlighting/annotating, good organization of PDF files into different categories to easily find what i'm looking for, etc...) but the very basic thing I need is a high quality display. I downloaded a PDF file from the web onto the iPad, and I was really impressed that it asked me right away if I wanted to store it in iBooks. I was also very happy that having the article full screen, the text was JUST big enough to read. This was great because pretty much all journal articles use a similar layout and font. Now the very bad news is that the resolution is just way to low for this to work. With the page full screen the text was small, but big enough to read. The problem was that the low resolution of the iPad 1 screen made the text blurry and hard to read. I could easily pinch-zoom or double tab a section to read it better, which is something I would probably do quite frequently; however it is a 100% necessity that the resolution be high enough that I can read through and scan the page to find what I'm looking for, and THEN zoom in on the paragraph/chart/graph/table I want. With the iPad 1 this won't work because the resolution is too low and the text is very blurry and hard to read. I CAN read it, but it's not nice on the eyes, and it's not until you zoom in that it starts looking sharp and nice. I was hoping this wasn't true, but a retina display is 100% necessary to use the iPad for reading journal articles like this. I was hoping that it would work fine with the iPad 1 resolution, and that a retina display resolution would just be 'bonus', but that is unfortunately not the case. If any of you are academics and needing to read lots of PDF journal articles, you will definitely want to pass on the iPad, and also pass on the iPad 2 unless it has a retina display. I am very disappointed by this discovery, because I was really hoping this could replace my printed papers. EDIT - After further use, it is NOT to due with the resolution of the PDF file, but of the iPad its self. I have used it more and it is not as blurry or bad as I thought at first, although a full screen PDF document is not super clear (still readable though). A high resolution display would make reading very small text like that MUCH easier and nicer, but it is still doable with the current resolution and not as 'make or break' as I first thought it was.