I remember back in the day on these forums when people swore by the 3.5" phone saying they never want anything bigger and they wouldn't buy anything bigger. People swore Apple would never make a phone with a screen larger than 3.5" blah blah blah.
There are many who want a larger phone. Apple should be about more choices. I'd buy a 5.5" iPhone in a heartbeat, I want a large screen, biggest I can get on a phone. I'm 6'2" and have large hands, holding my iPhone 5 is awkward when I type.
My girlfriend, on the other hand, loves her 5S and wouldn't want a bigger screen. The point is we should have choices. 4.7" is better than nothing, but I want that 5.5" phone, and hopefully we get some notice prior to launches, cause if I sign a new 2 year deal for the 4.7" phone and a 5.5" comes out a few months later that'd be crappy of Apple.