If you notice carefully the new iPhone is not a resolution change but a size change; they can letterbox old apps because the dimensions and resolution is identi

If you notice carefully the new iPhone is not a resolution change but a size change; they can letterbox old apps because the dimensions and resolution is identical to old iPhones that way. There is no comparable solution if you simply increase the PPI of the iPad Mini by 50%. It's either 1x pixels or 4x pixels, there is no middle ground.