Do not buy an iPhone 4...
...the high-dpi screen will ruin you for lesser displays.
The effect is deceptively subtle until you put it next to a standard ~100 dpi screen. Apple's otherwise awesome IPS displays look like crap once you've been exposed to 300+ dpi. Characters a half-millimeter tall are legible on this screen. I had to put it under a 3x magnifier and, squinting, I can just make out the individual pixels.
Resolution-independent graphics just moved up to the top of my desktop OS priority list.
The effect is deceptively subtle until you put it next to a standard ~100 dpi screen. Apple's otherwise awesome IPS displays look like crap once you've been exposed to 300+ dpi. Characters a half-millimeter tall are legible on this screen. I had to put it under a 3x magnifier and, squinting, I can just make out the individual pixels.
Resolution-independent graphics just moved up to the top of my desktop OS priority list.