We do, they're iPhone 5/5S/5Cs. Apple chose not to spend the extra $5 to give the Retina Mini that same quality display.
That $5 would probably translate to $50 total price increase. Apple has to meet price points and maintain high profitability. That is why the put a high PPI display in the rMini while keeping the same mediocre 68% sRGB. Most people were demanding a higher res screen; not one with better, more accurate colors.
That should come next year.