Tim Cook should really change that decision now. He is crazy to not release a 4.8 inch phone this year.
No one knows the truth about this matter. Rumors are not facts. I believe, however, Apple will definitely address the larger smartphone hole in their product lineup with a larger iPhone. And, it will be an awesome iPhone.
Sentiment: Strong Buy
Timing is key... sure hope Cook is realizing that he needs to address the perception that Apple is behind the curve in smartphone design now.
There is no question people want bigger screen. They'd rather have a bigger iphone, but if iphone stays 4" people will be forced to go to samsung for nicer screen.
I know this because I have a nice big samsung. the OS sucks,but the screen is way easier to read.