Pietro goes into depth about each of these reasons that it prevented him from making the purchase.
All of these arguments are excellent and I agree with all of them. Those factored into my decision. But there was one point that was left out was huge for me that I wanted to touch on. Most applications have not retina-field. I know the software developers are working hard now to update their graphic assets but it will still take some time. When I went to the Apple Store to check out the machine I was impressed. How could you not be? All the programs I was using for the most part were Apple based and had the opportunity to have been updated. I did come across a few Apple programs that had yet to be updated, and while the text looked great - the images and icons in many cases looked worse. What if the one application I use everyday looks worse for the next X months.