Have you compared an iPhone 4 to an iPhone 3G or 3GS? If you have, you understand the difference it makes. But I feel that with a computer that has a larger screen, you won't really notice the difference because usually the screen is further away from your face than an iPhone would. Yeah, if you get really close you will see a difference, but I don't see the point. I haven't seen one in person though so don't take my word for it.