These next-gen iPhone concepts are coming in thick and fast. The latest entrant to the fold is designer Kris Groen's renderings of what he thinks will be a more popular iPhone, with his concept featuring a larger screen size, increased to 4 inches diagonally with the beautiful retina display. Another thing you'll notice in Groen's renderings is two home buttons instead of one -- present on either side of the phone and which help in better app switching than Apple's current offering. The home button has long been under several designers' and Apple enthusiasts' radar, with many calling for a longer or shorter home button and some even arguing in favor of the home button being removed completely. The video below explains Groen's imagination.
