Retina or not, that's the question.
So if the next gen iPad mini came in several colours, would they keep the aluminum design (much like the iPod touch) or have some kind of plastic backing like the 'iPhone 5C'?
Recent evidence suggests the possibility that Apple will release TWO iPad mini models--one lower cost iPad mini with color options and non-retina display and one higher cost iPad mini in black or white and retina display. Thus Apple would have:
Lower-cost iPhone with colors (4" and 4.3"?)
Lower-cost iPad mini with colors (standard and retina displays)
Higher-cost iPhone (4.3"?)
Higher-cost iPad (retina displays)
Apple could restrict lower-cost iPhones to 8GB and 16GB of internal storage while keeping 16GB, 32GB, and 64GB storage options for the higher-cost iPhones. Similarly, iPads would be differentiated by the size of internal storage, just as they are currently; although I believe the iPad 2 will be discontinued. I believe Apple is targeting this kind of a lineup to address the need for lower priced devices while maintaining products for those who are able and willing to pay more. The only question is whether Apple will introduce a new larger screen size with the upcoming revision of the iPhone.