Gruber got a 7.85 in measurement somewhere (I think from a past article of his).
264ppi / 7.85 * 9.7 = 326 ppi
i.e., if they made a 7.85in iPad Mini, it would have the exact same DPI as a iPhone4/4S. I can COMPLETELY see this as a viable option, as they might be able to use some of the same lines as they do for the phones and they already know 326ppi is possible.
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I think retina is very possible still:
iPad 2012 is 264 ppi at 9.7 inches
Gruber got a 7.85 in measurement somewhere (I think from a past article of his).
264ppi / 7.85 * 9.7 = 326 ppi
i.e., if they made a 7.85in iPad Mini, it would have the exact same DPI as a iPhone4/4S. I can COMPLETELY see this as a viable option, as they might be able to use some of the same lines as they do for the phones and they already know 326ppi is possible.