I just ordered a 13 in rMBP. It was between this and the air and I decided to go with the retina for the screen. I have been researching more and am concerned about the difference between the 1600 resolution and the 800 resolution. Does this mean the retina display isn't effectively a retina display? Will using the "best for retina" display give me the same resolution as the cMBP? Sorry if this question seems naive.