Looking at the edge of my iPad's screen from extreme viewing angles, I notice how far the actual display is from the cover glass - about 3 or 4 millimetres. When I do the same with my iPhone 4, I notice absolutely zero gap. I'm sure this helps the IPS screen on the iPhone 4 look even more vibrant, than the iPad, when I look at them, side-by-side. If you're unsure what the lamination process is about, basically the screen is 'laminated' to the cover glass, leaving no physical gap, ensuring no light distortion and allegedly removes the possibility of dust getting in between the screen and the glass(this happened on all of my previous iPhones, a lot). They talk about it here, at about 2:20s in. Look at the pic below to see what I mean. Look at the 'iPad' text.