The absence of the curvy back really makes holding the device for phone calls and gaming a pleasure. ESPECIALLY gaming. I can now hold it at the bottom corners without really a problem.
And once devs start implementing the gyroscope on a wide scale? Can't wait for that.
Retina display...it makes me WANT to read books on it, unlike my old 3GS, which just made me feel kinda depressed. As a whole, the iPhone 4 is just perfect IMO.
1. Display is amazing, looks better than my MacBook.
2. Camera: Photo quality and features are very nice.
3. Battery: Thank God they finally made the iPhone last at least a whole day.
4. Speed: You can't go wrong with anything being faster.