EDIT: Sorry no idea why I posted this in the iOS 6 section, could a mod move please. I've had my 15" 2.4Ghz MBP since late 2010 and it's served me very well until now with the only issue being a trackpad issue rendering the left quarter unresponsive which I had replaced under Applecare. The only thing I have upgraded is the original 4Gb RAM to 8Gb about a year or two ago and getting the 1680x1050 screen. It's my main computer at home with which I mainly use it for web browsing, storing my music and photos, Latex for writing as well as the Office suite. I also use it occasionally for Matlab but given the limited RAM that's only in emergency. Bottom line, not too power intensive aside from Matlab, no video editing etc. Because of this, I thought about streamlining with something smaller like the Air which, after trying it out in-store, felt very speedy for general usage. However, I wasn't a fan of the screen res especially compared to Retina. With the release of the new rMBPs, I'm now considering an a 13" rMBP because of the screen and the thinner form factor than previous versions. My question is though, given that I'd want to get the most RAM possible since you can't upgrade later, would it worth upgrading from my current laptop?