I have both the iPad mini retina and the iPad air and holding them side by side it seems like a ton of space is wasted on the bigger screen. I think iOS works the best when icons are about the size of the mini. Apple can easily increase the resolution of the larger iPad to further set it apart. You can fit more on the home screens, view more content, etc. I think rumors were this is the direction apple is headed in. Kind of double minded about keeping the air now. Only thing I'm gaining with the air is just larger items (which is useful, don't get me wrong).