You'll be bowled over if you go to your local Apple Store and eyeball the iMac Retina. This will give you a very real sense of what's coming up in the rest of the world. It's like comparing your last century 720p CRT display with 2560x1440. On the other hand, you'll need to be prepared to feel disappointed with your current setup after having a glimpse of the future. Or buy yourself a Retina iMac for Christmas!