The iPad Mini is just a tad too wide to fit into an inside coat or jacket pocket. If Apple comes out with a back cover for the Mini, I'd like it to have something like a sandwich board where the back back part is of a width that would fit into the typical inside sport coat or jacket pocket. The back slab would go into the pocket; the iPad Mini itself would be outside the pocket but safe in its case resting against the shirt.
In the long run, what I'd like to see is the jacket/coat makers making inside pockets slightly wider. They could then advertise the fact that their inside jacket/coat pockets are iPad Mini friendly. The Mini will fit in the outside pockets but that becomes somewhat unwieldily unless the front buttons or zipper are fastened.