It's Not About Cost of a Retina Display...
Look lets get to the facts.
No one is manufacturing a 2048 x 1536 7.9" display just yet.
The iPad 3 & 4 require more powerful processor in order to drive the display. This A5X & A6X abridged processors also requires almost double the capacity battery and size (compared to the mini) in order to provide the 10 hour battery life.
So based on current requirements would you have happily accepted a 7.9" ipad mini that was a lot heavier and thicker than the current ipad mini with possibly dramatically reduced battery life, one that runs a lot hotter (less surface area for heat dispensation as the 3rd gen. and 4th gen. get much hotter than the mini) .
And then despite the extra weight, reduced battery performance would you still be happy to shell out the $529 your thread title boasts ?
The retina display in the mini was not feasible currently.
I've heard a lot of BS from posters on these forums the last few weeks declaring "but the iPod touch and iPhone 5 have retina displays", as justification for why the iPad mini should have had one, regardless of the fact that 1) no one is actually manufacturing one and 2) the iPhone 5 with 1136 x 640 resolution actually has LESS pixels than the iPad mini at 1024 x 768 (some 50k less pixels to be precise).
When & 'IF' apple can gain access to a processor that runs cooler and can still provide enough GPU grunt to drive a 3 million pixel display without requiring large battery or generating extra heat, then the iPad mini will get Retina.
This is not about Apple cutting costs, it's about the practicalities of putting the required hardware to drive a 2048 x 1536 display currently available into the mini's tiny frame. It simply doesnt exist in a form currently or to a the degree where the benefits (screen resolution) are outweighed by the cons (battery life, power requirements, weight etc..).
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nope, 499 is an ipad 4 with retina
2 inches larger
329 should have already had retina
"Should" doesn't always equal "it was currently possible"....