As usually happens when new Apple products are released, some of the earliest cases are merely modest updates to prior options. The iPad Air is no exception, with Kensington's Comercio Soft Folio Case & Stand ($40) as one of the first cases on the market. It's very similar to soft folios we've seen in the past, including the exposed corners, and a cover that tucks into the back to form a stand. This one does have business card holders on the inside,…