I can't see Apple keeping the iPad 2 with 30 pin connector. My guess is full size iPad will be retina only, and mini will have both non-retina and retina. It would be nice if the non-retina mini could drop in price, but I wouldn't be surprised if it doesn't.
Why can't Apple keep the retina to full-sized iPad only for another year?
From business pov, that seems to be the right thing to do. But I think Apple
is feeling the heat from Samsung with their gazillion models of different shapes and sizes. From what I can observe on the streets, on the train,I haven't seen people carrying the full-sized iPad in the last few months or so. Give another year or two, the buyers of full sized iPads will be die hard fans, and the sale will seriously plunge to the level of unprofitability.