The 27-inch iMac boasts even greater resolution of 2560 x 1440. That's a whopping 78 percent more pixels. And more pixels mean images look crisp and true to life. A 1000:1 contrast ratio gives you more vibrant colors and blacker blacks. All in a 16:9 aspect ratio - the same as an HDTV. The iMac display looks great from any seat in the house, thanks to a premium display technology called in-plane switching (IPS). IPS gives you a bright picture with excellent color - even if you're viewing the display from the side.