The iPhone 4 has what Apple is calling "Retina Display". What they mean is that the human eye can only see around 300 pixels per inch and they have built the iPhone 4 with 326 pixels per inch. This has the effect of making text and images look smoother and more similar to a high quality printed version.
It is a high resolution display. There is 4x as many pixels so it is 4x as sharp. This prevents the blur that happens when screens are viewed from a small distance. iPhone and iPod Touch uses this high resolution together with the multi-touch technology = Retina Display.
It's actually called the lens, which is in the cornea.
the back portion of the eye
The inner rear surface of the eye which contains photoreceptors it called the retina.
Before the retina; in the vitreous humor.
the cornea, which is a clear outer covering, refracts light onto the retina
Retina has a better screen resolution and more pixels, display is better on the Retina
LG Display
No, But there coming out with an ipad mini 2 soon with retina display
macboook pro retina display
macbook pro with retina display way better
Mostly. Note they both have the same retina display. The iPad with Retina Display has the A6X chip which does have better performance than A5X in New iPad.
Yes
no
LG
The Macbook Pro with Retina display does have an HDMI port. The Macbook Pro without Retina display do not have a HDMI port.
No, the Retina display model does not have a DVD-ROM drive. You can buy an external drive if need be.
Retina stands for the fact that the retina display has actually more pixels than our human eye (retina) is possible to see. It delivers stunning picture quality, and is far more crisper than a full HD TV.