I went to Best Buy and played around with the retina.
What ai42 said is spot on. The difference in just about everything was clear. Retina was definitely more pleasing to look at it.
In my unprofessional opinion, however, I don't think the price hike is worth the extra quality. Perhaps in the distant future I'll adopt the retina screen, but for now I'm happy with a measly 1600x screen.