Long story short, my fiancee does not have a computer, sans her iPad, so I was thinking of giving her my early 2011 MacBook Pro, and finally using my Apple gift cards I got for Christmas on a rMBP. My current MBP handles LR4 and CS6 perfectly fine as my post processing workflow. The main question I have is this: Will I notice a big difference from my MBP display I have now to the retina? And is it really worth the upgrade? Again, the main use will be for photography, with occassionally surfing the internet or reading email (but I mainly do both of those on my iPhone).