I've just got the new iPad 16GIGs 4G but I'm actually worried about a couple of things : 1.old apps that ran on iPad 2 ..will it work on the new iPad ?? How it will look like?? 2. Is 16 gigs considered insufficient after the enlargement of retina apps size?? I'm kinda short of money to get the 32 GiGs version ...so should I return it for a 16 gigs iPad 2 3G ?? well the size of retina ready apps like keynote decrease on the iPad 2??