Today is sort of a good-news-bad-news day. Apple's stock keeps plunging downward, yet already the buzz is beginning for a forthcoming Apple product: the iPad mini 2 with retina display. Macworld UK says that Apple's suppliers have said they're already working on a retina display for the iPad mini with a resolution of 2,048 by 1,536 — which would give it even greater pixel density than the fourth generation iPad. It's hard to imagine that this wouldn't happen, since all the other iOS devices are now using retina displays. The question is when we'll see it.