Apple will announced its new iOS version during WWDC which may happen in June 2014. After the iOS announcement Apple may release the iPhone 6 (Next iPhone) around end of 2014. There were rumors before about the larger bezel-less display for the iPhone. Check out the latest image of the leaked edge to edge bezel-less larger display of the iPhone 6.
This image shows the display of iPhone 4S, iPhone 5S and the leaked display glass of the iPhone 6.