Personally, I thought the 3.5" was perfect for a phone. But my main concern was that they were going to make it wider. And they didn't, which I liked. Even though I was content with the old size, this is a new leap forward for Apple. I also mainly upgraded because my iPhone 4 was too small on space, and the speed was just horrid compared to my new iPad. The camera was also behind the times. I didn't honestly care much for the screen size, I was in market for a new phone either way. This will do just fine though. The new screen size will most likely be adopted rather quickly. Also, most apps will be made for that ratio now anyway, so it makes no sense to get something old