Prior to IBM Clones, pretty much every system was the same across the board. Just like Android's situation. But even now, iP(hone/ad) isn't the same across th

Prior to IBM Clones, pretty much every system was the same across the board. Just like Android's situation. But even now, iP(hone/ad) isn't the same across the board. There are several generations with different hardware, plus a tablet or 2 to deal with. (And if we're lucky, the iPad 3 will have retina display.)