Quietly released three months after the debut of the third-generation iPad, the new iPad Smart Case ($49) finally offers iPad 2 and new iPad users an Apple-developed protective solution for either tablet's entire body. Using a magnetic, four-sectioned lid similar to the iPad Smart Cover, the iPad Smart Case protects the entire screen of the iPad or iPad 2, opening to become a folding stand for video or typing. The lid automatically locks and unlocks…