Launched for the third-generation iPad, Apple's iPad Smart Case had benefits and drawbacks. It offered more protection than a standalone iPad Smart Cover, but had an odd design that didn't feel great. Now, the company has brought out updated versions called the iPad Air Smart Case ($79) and iPad mini Smart Case ($69). Yes, the prices have jumped to eye-popping levels, but the material has switched from polyurethane to leather. The rear is now less…