As for the technical it`s been explained enough; Retina is easier on the eyes, better viewing angles, greater contrast, more accurate colour, you have the ability to alter the size if your workspace on the fly thanks to scaling. portability is up, overall it`s really a great portable.
What i have found is that as you use the Retina more, you really begin to appreciate the machine more and more, five minutes in the Apple store not going to cut it. The only absolute downside if for those who like to tinker and the Retina`s extremely limited upgrade path.
Some will have genuine issue with the retina, the "Hater`s" and the rest...
As the individual you must filter the content of the internet very carefully, everyone is a "Pro", everyone the "expert", for the most part they are not, some are well informed, most far from it . If you need help to make a significant purchase, or qualification on hardware, wait for a recognised source, not the kid with 10 minutes hands on in Best Buy
psssst i give you a tip, all MBP are going to be Retina soon, Apple`s not noted for elaborate product lines