The so-called Coverboard attaches to the tablet magnetically, and the grayish magnetic strip that runs along the edge of the cover matches the silver bezel surrounding the 10.1-inch display.
The A4WP's solution is a "non-radiative magnetic resonance-based wireless power transfer ecosystem" -- in short, it allows your phone, tablet or other A4WP-certified gadget (such as light bulbs, as demonstrated above) to charge from a small distance.