The comparison between a smartphone and an automobile doesn't make much sense. On one hand you compare a smaller car with an SUV. Large vehicles are were develo

The comparison between a smartphone and an automobile doesn't make much sense. On one hand you compare a smaller car with an SUV. Large vehicles are were developed to fill a very specific need, and were never intended to eliminate the need for a normal sized car. To the majority of the population, which doesn't often need to haul around large amounts of stuff, trucks and SUV's don't enhance functionality in a significant way, yet they are often far more expensive to operate and maintain. Large smartphones provide numerous enhancements in certain use cases, which can't really be debated. All else being equal, a large screen is better at displaying videos, documents, photos, books, and websites. Provided the phone remains reasonably small (the Galaxy Note is pushing it, but it's an extreme example), most people won't experience any significant drawbacks to having a larger phone. Most of the large screen phones are about an inch and a quarter larger than the iPhone's at most, so it's not like we are talking about a jump from a 5 ounce device to one that weighs two pounds. As I stated before, the only reason other than personal preference that one might have to stick with a smaller screen, would be if that particular user's hands were too small to use the phone comfortably.