You do realize "retina" is just a made up trade name for a display of sufficient ppi that you can't resolve individual pixels? On an iPhone, it's 324ppi on a 4" display. On an iPad 3, it's 264ppi on a 10" display. On a Nexus 10, it's 300ppi on a 10" display. On a Nook HD, it's 243ppi on a 7" display. In all cases, it's a higher quality display than what Apple offered in the iPad Mini.