Check out the video below to see a comparison between the Super LCD display on an HTC Desire, the Retina display on the iPhone 4 and the Super AMOLED screen on the Canadian version of the Samsung Galaxy S Vibrant I9000. To give you some background on each screen, the Desire is 3.7 inches with a resolution of 480 x 800 pixels. Apple's Retina display comes in at 960 x 640 on the same 3.5 inch sized screen as seen on prior iPhone models. Finally, this variant of the Galaxy S is equipped with a Super AMOLED display that comes in at the same 480 x 800 resolution as on the Desire.
Based on the video, it looks like the iPhone 4's Retina display comes in first followed by the Super LCD display and then the Super AMOLED screen. While staring at a video is not the best way to make this decision, anyone out there have a different order of placement?
Apple iPhone 4 Specifications | Review
HTC Desire Specifications | Review (European version)
Samsung Galaxy S I9000 Specifications | Review (European version)