EDIT: I see nothing innovative with the list of devices you mentioned - 'The new iPad', 'Retina MBP', etc. They are just iterations of previous devices with a higher resolution. The iPad mini is old news, because it is just following the path the Nexus 7 has set. Nothing innovative here.

Many talk about fragmentation on Android all the time, just wait and see how much fragmentation, nightmares and hell this Retina resolution would cause to designers.