Originally Posted by afv011
Yes, they could. We have now a tablet with 300dpi, a mini with the resolution of the ipad3/4 would be around the same dpi, so no excuse. Expect a retina mini within 12 months, if not less.
No, if it was that simple, every laptop and PC monitor would have been "retina display" a long time ago. You are asking to have over 4 million pixels in a space that is 7.9 inches, no other competitor has that resolution either.
Secondly, Apple uses a higher quality lcd unlike the competitors. There is a reason why an IPS 24" monitor goes for $500+, while a TN 24" monitor is $199.
People think Apple could sell a retina display along with a $249 price along with 32GB of space and that is an expectation that not even the Kindle Fire HD is able to handle. Amazon is even putting ads on theirs!
Next year will be an upgrade to the iPad mini with faster processor, IGZO screen, and more ram. Don't expect a retina display.