Apple has released a new tablet, the iPad Air, and once again, Griffin has matched it with a version of its CinemaSeat ($40) seatback mounting kit. Essentially unchanged in its overall design since the first edition for the original iPad, the faux leather and neoprene holder comes equipped with a nylon strap that wraps around the bars of a carseat's headrest, allowing for hands-free video viewing. Large holes expose the ports and buttons, and there's…