As another user said.... YES you are. If you can't tell retina from non-retina, you need some glasses. Any app designed for retina sticks out like a big, sore, retina thumb.
Haha, so I need glasses? I can notice the retina on the iPad and iPhone but the macs already HAD a great screen in my eyes. I haven't used the MBPR that much in the store, i just looked at it and tried some apps.